CVE-2026-41940 (GCVE-0-2026-41940)

Vulnerability from cvelistv5 – Published: 2026-04-29 15:10 – Updated: 2026-08-11 03:55
VLAI CISA ENISA Shadowserver KEVIntel
Title
WebPros cPanel and WHM Authentication Bypass via Login Flow
Summary
cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-29 00:00 UTC
CWE
  • CWE-306 - Missing Authentication for Critical Function
Assigner
References
Impacted products
Vendor Product Version
WebPros cPanel Affected: 11.40.0.0 , < 11.86.0.41 (custom)
Affected: 11.88.0.0 , < 11.94.0.28 (custom)
Affected: 11.96.0.0 , < 11.102.0.39 (custom)
Affected: 11.104.0.0 , < 11.110.0.97 (custom)
Affected: 11.112.0.0 , < 11.118.0.63 (custom)
Affected: 11.120.0.0 , < 11.124.0.35 (custom)
Affected: 11.126.0.0 , < 11.126.0.54 (custom)
Affected: 11.128.0.0 , < 11.130.0.19 (custom)
Affected: 11.132.0.0 , < 11.132.0.29 (custom)
Affected: 11.134.0.0 , < 11.134.0.20 (custom)
Affected: 11.136.0.0 , < 11.136.0.5 (custom)
Create a notification for this product.
WebPros WP Squared Unaffected: 11.136.1.7 (custom)
Create a notification for this product.
WebPros WHM Affected: 11.40.0.0 , < 11.86.0.41 (custom)
Affected: 11.88.0.0 , < 11.94.0.28 (custom)
Affected: 11.96.0.0 , < 11.102.0.39 (custom)
Affected: 11.104.0.0 , < 11.110.0.97 (custom)
Affected: 11.112.0.0 , < 11.118.0.63 (custom)
Affected: 11.120.0.0 , < 11.124.0.35 (custom)
Affected: 11.126.0.0 , < 11.126.0.54 (custom)
Affected: 11.128.0.0 , < 11.130.0.19 (custom)
Affected: 11.132.0.0 , < 11.132.0.29 (custom)
Affected: 11.134.0.0 , < 11.134.0.20 (custom)
Affected: 11.136.0.0 , < 11.136.0.5 (custom)
Create a notification for this product.
Date Public
2026-04-28 00:00
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 494e7521-f818-4040-8b8d-ac9818d42390

Vulnerability ID: CVE-2026-41940

Status: Confirmed

Status Updated: 2026-04-30 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-04-30
Asserted: 2026-04-30
Scope
Notes: KEV entry: WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability | Affected: WebPros / cPanel & WHM and WP2 (WordPress Squared) | Description: WebPros cPanel & WHM (WebHost Manager) and WP2 (WordPress Squared) contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel. | Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. | Due date: 2026-05-03 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026 ; https://docs.cpanel.net/release-notes/release-notes/ ; https://docs.wpsquared.com/changelogs/versions/changelog/#13617 ; https://nvd.nist.gov/vuln/detail/CVE-2026-41940"
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-306
Feed CISA Known Exploited Vulnerabilities Catalog
Product cPanel & WHM and WP2 (WordPress Squared)
Due Date 2026-05-03
Date Added 2026-04-30
Vendorproject WebPros
Vulnerabilityname WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-04-30 17:00 UTC | Updated: 2026-04-30 17:00 UTC
ENISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: fb1475de-64e4-4e31-b792-e7e8c7a54664

Vulnerability ID: CVE-2026-41940

Status: Confirmed

Status Updated: 2026-05-08 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-05-08
Asserted: 2026-05-08
Scope
Notes: Affected: WebPros / cPanel | Description: cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel. | Exploitation type: ransomware | CWEs: CWE-306 | Origin source: CERT-PL | Notes: https://support.cpanel.net/hc/en-us/articles/40073787579671-Security-CVE-2026-41940-cPanel-WHM-WP2-Security-Update-04-28-2026
Evidence

Type: Csirt Report

Signal: Confirmed Compromise

Confidence: 75%

Source: enisa-cnw-kev

Details
Cwes CWE-306
Euvd EUVD-2026-26246
Notes https://support.cpanel.net/hc/en-us/articles/40073787579671-Security-CVE-2026-41940-cPanel-WHM-WP2-Security-Update-04-28-2026
Catalog ENISA / EU CSIRTs Network (CNW) KEV JSON
Product cPanel
Datereported 2026/05/08
Originsource CERT-PL
Vendorproject WebPros
Exploitationtype ransomware
Vulnerabilityname
Threatactorsexploiting -
References
Created: 2026-05-21 09:12 UTC | Updated: 2026-05-21 09:12 UTC
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 163fb203-8a00-4bb8-8e99-49b545f0f8a2

Vulnerability ID: CVE-2026-41940

Status: Confirmed

Status Updated: 2026-07-20 00:00 UTC

Exploited: Yes

Characteristics
Severity: 98.0
Timestamps
First Seen: 2026-04-30
Asserted: 2026-04-30
Last Seen: 2026-07-20
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: cPanel / cPanel and WHM | Class: remote-access | Severity: Critical (CVSS 9.8) | IoT: no | In CISA KEV: yes | Honeypot connections on 2026-07-20: 2339
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 143
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class remote-access
7D Avg 126
Vendor cPanel
30D Avg 184
90D Avg 268
Product cPanel and WHM
Cisa Kev yes
Connections 2339
Observation Date 2026-07-20
Vulnerability Class CVSS
Vulnerability Score 9.8
Vulnerability Severity Critical
References
Created: 2026-06-30 09:22 UTC | Updated: 2026-07-22 01:00 UTC
KEVIntel
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 38180d7b-afdd-4d06-ae15-0303f6fe5c74

Vulnerability ID: CVE-2026-41940

Status: Confirmed

Status Updated: 2026-06-01 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-06-01
Asserted: 2026-06-01
Scope
Notes: KEVIntel entry: WebPros cPanel and WHM Authentication Bypass via Login Flow | Affected: WebPros / cPanel, WP Squared, WHM | CVSS: 9.3 (CRITICAL) | EPSS: 0.90543 | Used in malware: yes | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Confirmed Compromise

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title WebPros cPanel and WHM Authentication Bypass via Login Flow
Vendor WebPros
Product cPanel, WP Squared, WHM
Added Date 2026-06-01T00:00:00.000Z
Cvss Score 9.3
Epss Score 0.90543
Cvss Severity CRITICAL
Epss Percentile 0.99789
Used In Malware yes
Ahead Of Cisa Kev 
{
  "count": 1,
  "unit": "day"
}
Not Yet In Cisa Kev False
References
Created: 2026-06-23 14:03 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-41940",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-29T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          },
          {
            "other": {
              "content": {
                "dateAdded": "2026-04-30",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940"
              },
              "type": "kev"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-11T03:55:30.673Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py"
          },
          {
            "tags": [
              "government-resource"
            ],
            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-04-30T00:00:00.000Z",
            "value": "CVE-2026-41940 added to CISA KEV"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2026-05-04T16:13:16.841Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/"
          },
          {
            "url": "https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/"
          }
        ],
        "title": "CVE Program Container",
        "x_generator": {
          "engine": "ADPogram 0.0.1"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "cPanel",
          "vendor": "WebPros",
          "versions": [
            {
              "lessThan": "11.86.0.41",
              "status": "affected",
              "version": "11.40.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.94.0.28",
              "status": "affected",
              "version": "11.88.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.102.0.39",
              "status": "affected",
              "version": "11.96.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.110.0.97",
              "status": "affected",
              "version": "11.104.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.118.0.63",
              "status": "affected",
              "version": "11.112.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.124.0.35",
              "status": "affected",
              "version": "11.120.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.126.0.54",
              "status": "affected",
              "version": "11.126.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.130.0.19",
              "status": "affected",
              "version": "11.128.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.132.0.29",
              "status": "affected",
              "version": "11.132.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.134.0.20",
              "status": "affected",
              "version": "11.134.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.136.0.5",
              "status": "affected",
              "version": "11.136.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "WP Squared",
          "vendor": "WebPros",
          "versions": [
            {
              "status": "unaffected",
              "version": "11.136.1.7",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "WHM",
          "vendor": "WebPros",
          "versions": [
            {
              "lessThan": "11.86.0.41",
              "status": "affected",
              "version": "11.40.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.94.0.28",
              "status": "affected",
              "version": "11.88.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.102.0.39",
              "status": "affected",
              "version": "11.96.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.110.0.97",
              "status": "affected",
              "version": "11.104.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.118.0.63",
              "status": "affected",
              "version": "11.112.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.124.0.35",
              "status": "affected",
              "version": "11.120.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.126.0.54",
              "status": "affected",
              "version": "11.126.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.130.0.19",
              "status": "affected",
              "version": "11.128.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.132.0.29",
              "status": "affected",
              "version": "11.132.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.134.0.20",
              "status": "affected",
              "version": "11.134.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "11.136.0.5",
              "status": "affected",
              "version": "11.136.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.86.0.41",
                  "versionStartIncluding": "11.40.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.94.0.28",
                  "versionStartIncluding": "11.88.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.102.0.39",
                  "versionStartIncluding": "11.96.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.110.0.97",
                  "versionStartIncluding": "11.104.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.118.0.63",
                  "versionStartIncluding": "11.112.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.124.0.35",
                  "versionStartIncluding": "11.120.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.126.0.54",
                  "versionStartIncluding": "11.126.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.130.0.19",
                  "versionStartIncluding": "11.128.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.132.0.29",
                  "versionStartIncluding": "11.132.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.134.0.20",
                  "versionStartIncluding": "11.134.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.136.0.5",
                  "versionStartIncluding": "11.136.0.0",
                  "vulnerable": true
                }
              ],
              "operator": "OR"
            }
          ]
        },
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.86.0.41",
                  "versionStartIncluding": "11.40.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.94.0.28",
                  "versionStartIncluding": "11.88.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.102.0.39",
                  "versionStartIncluding": "11.96.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.110.0.97",
                  "versionStartIncluding": "11.104.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.118.0.63",
                  "versionStartIncluding": "11.112.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.124.0.35",
                  "versionStartIncluding": "11.120.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.126.0.54",
                  "versionStartIncluding": "11.126.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.130.0.19",
                  "versionStartIncluding": "11.128.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.132.0.29",
                  "versionStartIncluding": "11.132.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "11.130.0.18",
                  "versionStartIncluding": "11.134.0.0",
                  "vulnerable": true
                }
              ],
              "operator": "OR"
            }
          ]
        },
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:cpanel:wp_squared:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "136.1.7",
                  "vulnerable": true
                }
              ],
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-04-28T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "CWE-306 Missing Authentication for Critical Function",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-06T15:48:18.270Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://docs.cpanel.net/release-notes/release-notes"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://docs.wpsquared.com/changelogs/versions/changelog/#13617"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "WebPros cPanel and WHM Authentication Bypass via Login Flow",
      "x_generator": {
        "engine": "Vulnogram 1.0.2"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-41940",
    "datePublished": "2026-04-29T15:10:37.899Z",
    "dateReserved": "2026-04-22T18:50:43.621Z",
    "dateUpdated": "2026-08-11T03:55:30.673Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "cisa_known_exploited": {
      "cveID": "CVE-2026-41940",
      "cwes": "[\"CWE-306\"]",
      "dateAdded": "2026-04-30",
      "dueDate": "2026-05-03",
      "knownRansomwareCampaignUse": "Known",
      "notes": "https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026 ; https://docs.cpanel.net/release-notes/release-notes/ ; https://docs.wpsquared.com/changelogs/versions/changelog/#13617 ; https://nvd.nist.gov/vuln/detail/CVE-2026-41940\"",
      "product": "cPanel \u0026 WHM and WP2 (WordPress Squared)",
      "requiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
      "shortDescription": "WebPros cPanel \u0026 WHM (WebHost Manager) and WP2 (WordPress Squared) contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.",
      "vendorProject": "WebPros",
      "vulnerabilityName": "WebPros cPanel \u0026 WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability"
    },
    "epss": {
      "cve": "CVE-2026-41940",
      "date": "2026-08-14",
      "epss": "0.97927",
      "percentile": "0.99905"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-41940\",\"sourceIdentifier\":\"disclosure@vulncheck.com\",\"published\":\"2026-04-29T16:16:25.037\",\"lastModified\":\"2026-06-17T10:47:13.957\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.\"}],\"affected\":[{\"source\":\"disclosure@vulncheck.com\",\"affectedData\":[{\"vendor\":\"WebPros\",\"product\":\"cPanel\",\"defaultStatus\":\"affected\",\"versions\":[{\"version\":\"11.40.0.0\",\"lessThan\":\"11.86.0.41\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.88.0.0\",\"lessThan\":\"11.94.0.28\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.96.0.0\",\"lessThan\":\"11.102.0.39\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.104.0.0\",\"lessThan\":\"11.110.0.97\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.112.0.0\",\"lessThan\":\"11.118.0.63\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.120.0.0\",\"lessThan\":\"11.124.0.35\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.126.0.0\",\"lessThan\":\"11.126.0.54\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.128.0.0\",\"lessThan\":\"11.130.0.19\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.132.0.0\",\"lessThan\":\"11.132.0.29\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.134.0.0\",\"lessThan\":\"11.134.0.20\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.136.0.0\",\"lessThan\":\"11.136.0.5\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"WebPros\",\"product\":\"WP Squared\",\"defaultStatus\":\"affected\",\"versions\":[{\"version\":\"11.136.1.7\",\"versionType\":\"custom\",\"status\":\"unaffected\"}]},{\"vendor\":\"WebPros\",\"product\":\"WHM\",\"defaultStatus\":\"affected\",\"versions\":[{\"version\":\"11.40.0.0\",\"lessThan\":\"11.86.0.41\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.88.0.0\",\"lessThan\":\"11.94.0.28\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.96.0.0\",\"lessThan\":\"11.102.0.39\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.104.0.0\",\"lessThan\":\"11.110.0.97\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.112.0.0\",\"lessThan\":\"11.118.0.63\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.120.0.0\",\"lessThan\":\"11.124.0.35\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.126.0.0\",\"lessThan\":\"11.126.0.54\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.128.0.0\",\"lessThan\":\"11.130.0.19\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.132.0.0\",\"lessThan\":\"11.132.0.29\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.134.0.0\",\"lessThan\":\"11.134.0.20\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"11.136.0.0\",\"lessThan\":\"11.136.0.5\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"disclosure@vulncheck.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":9.3,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"HIGH\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"disclosure@vulncheck.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-04-29T00:00:00+00:00\",\"id\":\"CVE-2026-41940\",\"options\":[{\"exploitation\":\"active\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"cisaExploitAdd\":\"2026-04-30\",\"cisaActionDue\":\"2026-05-03\",\"cisaRequiredAction\":\"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.\",\"cisaVulnerabilityName\":\"WebPros cPanel \u0026 WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability\",\"weaknesses\":[{\"source\":\"disclosure@vulncheck.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-306\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"11.40\",\"versionEndExcluding\":\"86.0.41\",\"matchCriteriaId\":\"D018D47F-B020-41B1-8755-9197EB8673D3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"88.0.0\",\"versionEndExcluding\":\"110.0.97\",\"matchCriteriaId\":\"9BF3DBAC-D629-44A9-B102-2D8F82709CA2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"112.0.0\",\"versionEndExcluding\":\"118.0.63\",\"matchCriteriaId\":\"3EEFF12C-11E8-4A5C-9C72-BA1A422A9E72\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"120.0.0\",\"versionEndExcluding\":\"124.0.35\",\"matchCriteriaId\":\"5533AA73-5007-4820-A5C6-0460C486882D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"126.0.1\",\"versionEndExcluding\":\"126.0.54\",\"matchCriteriaId\":\"15C0513D-8C56-4C5F-B818-E2CE90223AD4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"128.0.0\",\"versionEndExcluding\":\"130.0.19\",\"matchCriteriaId\":\"B5FE32EC-AEFB-4B27-AE65-A95432CAA812\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"132.0.0\",\"versionEndExcluding\":\"132.0.29\",\"matchCriteriaId\":\"24982921-6C0D-478E-BBF1-7C9DC7023760\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"134.0.0\",\"versionEndExcluding\":\"134.0.20\",\"matchCriteriaId\":\"B0213A2B-4A5A-4098-87FF-517E33F96807\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"136.0.0\",\"versionEndExcluding\":\"136.0.5\",\"matchCriteriaId\":\"09F99F08-1FB9-4BC6-8C7D-52062BA28479\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"11.40\",\"versionEndExcluding\":\"86.0.41\",\"matchCriteriaId\":\"63BE6DEF-A6EA-4545-9A3D-E1BA84A50EC7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"88.0.0\",\"versionEndExcluding\":\"110.0.97\",\"matchCriteriaId\":\"74E9C069-EA63-4B95-9229-45AD97563532\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"112.0.0\",\"versionEndExcluding\":\"118.0.63\",\"matchCriteriaId\":\"2FCD52CF-3F10-4FFA-8FC7-AA5F370AF9B8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"120.0.0\",\"versionEndExcluding\":\"124.0.35\",\"matchCriteriaId\":\"2ED81103-D03E-4351-9C19-1B3F120268D6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"126.0.1\",\"versionEndExcluding\":\"126.0.54\",\"matchCriteriaId\":\"6DC3D6F0-8D07-4719-977E-DB978AEB7A67\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"128.0.0\",\"versionEndExcluding\":\"130.0.19\",\"matchCriteriaId\":\"C6C216F5-330D-4DAA-B042-1A4707FF658E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"132.0.0\",\"versionEndExcluding\":\"132.0.29\",\"matchCriteriaId\":\"8793EED8-BDBD-4CC8-9698-FCEE769CFB5B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"134.0.0\",\"versionEndExcluding\":\"134.0.20\",\"matchCriteriaId\":\"53AC31A0-AD91-4897-89E7-1C05AF03BF5A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"136.0.0\",\"versionEndExcluding\":\"136.0.5\",\"matchCriteriaId\":\"23D646D3-2BDC-44C8-8C5F-9E21B0613A48\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cpanel:wp_squared:*:*:*:*:*:wordpress:*:*\",\"versionEndExcluding\":\"136.1.7\",\"matchCriteriaId\":\"80392939-B45D-4C12-ADBB-334E783BDE67\"}]}]}],\"references\":[{\"url\":\"https://docs.cpanel.net/release-notes/release-notes\",\"source\":\"disclosure@vulncheck.com\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://docs.wpsquared.com/changelogs/versions/changelog/#13617\",\"source\":\"disclosure@vulncheck.com\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026\",\"source\":\"disclosure@vulncheck.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026\",\"source\":\"disclosure@vulncheck.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow\",\"source\":\"disclosure@vulncheck.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Press/Media Coverage\"]},{\"url\":\"https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"tags\":[\"US Government Resource\"]}]}}",
    "redhat_vex": {
      "current_release_date": "2026-04-30T20:48:22+00:00",
      "cve": "CVE-2026-41940",
      "id": "CVE-2026-41940",
      "initial_release_date": "2026-04-28T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "WebPros cPanel and WHM Authentication Bypass via Login Flow",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41940.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/\"}, {\"url\": \"https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/\"}], \"x_generator\": {\"engine\": \"ADPogram 0.0.1\"}, \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2026-05-04T16:13:16.841Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-41940\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"active\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-30T16:41:31.725741Z\"}}}, {\"other\": {\"type\": \"kev\", \"content\": {\"dateAdded\": \"2026-04-30\", \"reference\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940\"}}}], \"references\": [{\"url\": \"https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py\", \"tags\": [\"exploit\"]}, {\"url\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940\", \"tags\": [\"government-resource\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-29T15:34:02.425Z\"}, \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-04-30T00:00:00.000Z\", \"value\": \"CVE-2026-41940 added to CISA KEV\"}]}], \"cna\": {\"title\": \"WebPros cPanel and WHM Authentication Bypass via Login Flow\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 9.3, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N\", \"exploitMaturity\": \"NOT_DEFINED\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"HIGH\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}, {\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 9.8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"WebPros\", \"product\": \"cPanel\", \"versions\": [{\"status\": \"affected\", \"version\": \"11.40.0.0\", \"lessThan\": \"11.86.0.41\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.88.0.0\", \"lessThan\": \"11.94.0.28\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.96.0.0\", \"lessThan\": \"11.102.0.39\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.104.0.0\", \"lessThan\": \"11.110.0.97\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.112.0.0\", \"lessThan\": \"11.118.0.63\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.120.0.0\", \"lessThan\": \"11.124.0.35\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.126.0.0\", \"lessThan\": \"11.126.0.54\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.128.0.0\", \"lessThan\": \"11.130.0.19\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.132.0.0\", \"lessThan\": \"11.132.0.29\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.134.0.0\", \"lessThan\": \"11.134.0.20\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.136.0.0\", \"lessThan\": \"11.136.0.5\", \"versionType\": \"custom\"}], \"defaultStatus\": \"affected\"}, {\"vendor\": \"WebPros\", \"product\": \"WP Squared\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"11.136.1.7\", \"versionType\": \"custom\"}], \"defaultStatus\": \"affected\"}, {\"vendor\": \"WebPros\", \"product\": \"WHM\", \"versions\": [{\"status\": \"affected\", \"version\": \"11.40.0.0\", \"lessThan\": \"11.86.0.41\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.88.0.0\", \"lessThan\": \"11.94.0.28\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.96.0.0\", \"lessThan\": \"11.102.0.39\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.104.0.0\", \"lessThan\": \"11.110.0.97\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.112.0.0\", \"lessThan\": \"11.118.0.63\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.120.0.0\", \"lessThan\": \"11.124.0.35\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.126.0.0\", \"lessThan\": \"11.126.0.54\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.128.0.0\", \"lessThan\": \"11.130.0.19\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.132.0.0\", \"lessThan\": \"11.132.0.29\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.134.0.0\", \"lessThan\": \"11.134.0.20\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.136.0.0\", \"lessThan\": \"11.136.0.5\", \"versionType\": \"custom\"}], \"defaultStatus\": \"affected\"}], \"datePublic\": \"2026-04-28T00:00:00.000Z\", \"references\": [{\"url\": \"https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026\", \"tags\": [\"vendor-advisory\", \"patch\"]}, {\"url\": \"https://docs.cpanel.net/release-notes/release-notes\", \"tags\": [\"release-notes\"]}, {\"url\": \"https://docs.wpsquared.com/changelogs/versions/changelog/#13617\", \"tags\": [\"release-notes\"]}, {\"url\": \"https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow\", \"tags\": [\"third-party-advisory\"]}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.2\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-306\", \"description\": \"CWE-306 Missing Authentication for Critical Function\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.86.0.41\", \"versionStartIncluding\": \"11.40.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.94.0.28\", \"versionStartIncluding\": \"11.88.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.102.0.39\", \"versionStartIncluding\": \"11.96.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.110.0.97\", \"versionStartIncluding\": \"11.104.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.118.0.63\", \"versionStartIncluding\": \"11.112.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.124.0.35\", \"versionStartIncluding\": \"11.120.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.126.0.54\", \"versionStartIncluding\": \"11.126.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.130.0.19\", \"versionStartIncluding\": \"11.128.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.132.0.29\", \"versionStartIncluding\": \"11.132.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.134.0.20\", \"versionStartIncluding\": \"11.134.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.136.0.5\", \"versionStartIncluding\": \"11.136.0.0\"}], \"operator\": \"OR\"}]}, {\"nodes\": [{\"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.86.0.41\", \"versionStartIncluding\": \"11.40.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.94.0.28\", \"versionStartIncluding\": \"11.88.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.102.0.39\", \"versionStartIncluding\": \"11.96.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.110.0.97\", \"versionStartIncluding\": \"11.104.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.118.0.63\", \"versionStartIncluding\": \"11.112.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.124.0.35\", \"versionStartIncluding\": \"11.120.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.126.0.54\", \"versionStartIncluding\": \"11.126.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.130.0.19\", \"versionStartIncluding\": \"11.128.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.132.0.29\", \"versionStartIncluding\": \"11.132.0.0\"}, {\"criteria\": \"cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"11.130.0.18\", \"versionStartIncluding\": \"11.134.0.0\"}], \"operator\": \"OR\"}]}, {\"nodes\": [{\"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:cpanel:wp_squared:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"136.1.7\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"shortName\": \"VulnCheck\", \"dateUpdated\": \"2026-05-06T15:48:18.270Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-41940\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-11T03:55:30.673Z\", \"dateReserved\": \"2026-04-22T18:50:43.621Z\", \"assignerOrgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"datePublished\": \"2026-04-29T15:10:37.899Z\", \"assignerShortName\": \"VulnCheck\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.