Vulnerability-Lookup

GHSA-MFWC-76P3-M2RC

Vulnerability from github – Published: 2026-02-26 03:31 – Updated: 2026-02-26 03:31

Details

The User Registration & Membership – Custom Registration Form, Login Form, and User Profile plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.1.2 via the 'register_member' function, due to missing validation on the 'member_id' user controlled key. This makes it possible for unauthenticated attackers to delete arbitrary user accounts that newly registered on the site who has the 'urm_user_just_created' user meta set.

Severity

5.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-2356"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-26T03:16:05Z",
    "severity": "MODERATE"
  },
  "details": "The User Registration \u0026 Membership \u2013 Custom Registration Form, Login Form, and User Profile plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.1.2 via the \u0027register_member\u0027 function, due to missing validation on the \u0027member_id\u0027 user controlled key. This makes it possible for unauthenticated attackers to delete arbitrary user accounts that newly registered on the site who has the \u0027urm_user_just_created\u0027 user meta set.",
  "id": "GHSA-mfwc-76p3-m2rc",
  "modified": "2026-02-26T03:31:18Z",
  "published": "2026-02-26T03:31:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2356"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/user-registration/tags/5.1.1/modules/membership/includes/AJAX.php#L142"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a5a1ccb2-4f78-4855-a01d-b15f73407822?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-2356 (GCVE-0-2026-2356)

Vulnerability from cvelistv5 – Published: 2026-02-26 02:23 – Updated: 2026-04-08 17:13

Title

User Registration & Membership <= 5.1.2 - Insecure Direct Object Reference to Unauthenticated Limited User Deletion

Summary

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-02-26 14:41 UTC

CWE

CWE-284 - Improper Access Control

Assigner

Wordfence mitre root

References

2 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/user-r…

Impacted products

1 product

Vendor	Product	Version
wpeverest	User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder	Affected: 0 , ≤ 5.1.2 (semver)

Credits

Phú

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-2356",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-26T14:41:43.910634Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-26T14:41:55.080Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "User Registration \u0026 Membership \u2013 Free \u0026 Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration \u0026 Login Builder",
          "vendor": "wpeverest",
          "versions": [
            {
              "lessThanOrEqual": "5.1.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Ph\u00fa"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The User Registration \u0026 Membership \u2013 Custom Registration Form, Login Form, and User Profile plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.1.2 via the \u0027register_member\u0027 function, due to missing validation on the \u0027member_id\u0027 user controlled key. This makes it possible for unauthenticated attackers to delete arbitrary user accounts that newly registered on the site who has the \u0027urm_user_just_created\u0027 user meta set."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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      "providerMetadata": {
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        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
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        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/user-registration/tags/5.1.1/modules/membership/includes/AJAX.php#L142"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-02-11T17:11:10.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-02-25T13:29:35.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "User Registration \u0026 Membership \u003c= 5.1.2 - Insecure Direct Object Reference to Unauthenticated Limited User Deletion"
    }
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  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
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    "datePublished": "2026-02-26T02:23:55.847Z",
    "dateReserved": "2026-02-11T16:54:51.661Z",
    "dateUpdated": "2026-04-08T17:13:17.648Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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GHSA-MFWC-76P3-M2RC

CVE-2026-2356 (GCVE-0-2026-2356)

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