CVE-2026-9055 (GCVE-0-2026-9055)

Vulnerability from cvelistv5 – Published: 2026-09-02 04:26 – Updated: 2026-09-02 04:26
VLAI
Title
Booking for Appointments and Events Calendar – Amelia (Premium) 8.0 - 9.6.2 - Unauthenticated Privilege Escalation to Administrator via 'externalId'
Summary
The Booking for Appointments and Events Calendar – Amelia (Premium) plugin for WordPress is vulnerable to Privilege Escalation in versions 8.0 - 9.6.2. This is due to insufficient validation of the attacker-controlled 'type' parameter in the customer update endpoint, which allows customers to set their role to 'manager' and trigger creation of a WordPress user with the wpamelia-manager role when the 'externalId' parameter is set to 0. This makes it possible for unauthenticated attackers to escalate their privileges to administrator by first elevating to the manager role, then creating a provider entity linked to an administrator user ID and overwriting that administrator's password.
CWE
  • CWE-269 - Improper Privilege Management
Impacted products
Vendor Product Version CPE status
melograno Booking for Appointments and Events Calendar – Amelia Affected: 8.0 , ≤ 9.6.2 (semver)
guessed Create a notification for this product.
Credits
Show details on NVD website

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Booking for Appointments and Events Calendar \u2013 Amelia",
          "vendor": "melograno",
          "versions": [
            {
              "lessThanOrEqual": "9.6.2",
              "status": "affected",
              "version": "8.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "d.v4n_s3c"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Booking for Appointments and Events Calendar \u2013 Amelia (Premium) plugin for WordPress is vulnerable to Privilege Escalation in versions 8.0 - 9.6.2. This is due to insufficient validation of the attacker-controlled \u0027type\u0027 parameter in the customer update endpoint, which allows customers to set their role to \u0027manager\u0027 and trigger creation of a WordPress user with the wpamelia-manager role when the \u0027externalId\u0027 parameter is set to 0. This makes it possible for unauthenticated attackers to escalate their privileges to administrator by first elevating to the manager role, then creating a provider entity linked to an administrator user ID and overwriting that administrator\u0027s password."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-269",
              "description": "CWE-269 Improper Privilege Management",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-02T04:26:46.198Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/0c2266b8-cc23-46de-bc80-09e3d6294854?source=cve"
        },
        {
          "url": "https://wpamelia.com/documentation/changelog/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-20T01:27:43.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-09-01T00:00:00.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Booking for Appointments and Events Calendar \u2013 Amelia (Premium) 8.0 - 9.6.2 - Unauthenticated Privilege Escalation to Administrator via \u0027externalId\u0027"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-9055",
    "datePublished": "2026-09-02T04:26:46.198Z",
    "dateReserved": "2026-05-20T01:12:10.006Z",
    "dateUpdated": "2026-09-02T04:26:46.198Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-9055\",\"sourceIdentifier\":\"security@wordfence.com\",\"published\":\"2026-09-02T05:17:10.937\",\"lastModified\":\"2026-09-02T05:17:10.937\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The Booking for Appointments and Events Calendar \u2013 Amelia (Premium) plugin for WordPress is vulnerable to Privilege Escalation in versions 8.0 - 9.6.2. This is due to insufficient validation of the attacker-controlled \u0027type\u0027 parameter in the customer update endpoint, which allows customers to set their role to \u0027manager\u0027 and trigger creation of a WordPress user with the wpamelia-manager role when the \u0027externalId\u0027 parameter is set to 0. This makes it possible for unauthenticated attackers to escalate their privileges to administrator by first elevating to the manager role, then creating a provider entity linked to an administrator user ID and overwriting that administrator\u0027s password.\"}],\"affected\":[{\"source\":\"security@wordfence.com\",\"affectedData\":[{\"vendor\":\"melograno\",\"product\":\"Booking for Appointments and Events Calendar \u2013 Amelia\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"8.0\",\"lessThanOrEqual\":\"9.6.2\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@wordfence.com\",\"type\":\"Primary\",\"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}]},\"weaknesses\":[{\"source\":\"security@wordfence.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-269\"}]}],\"references\":[{\"url\":\"https://wpamelia.com/documentation/changelog/\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://www.wordfence.com/threat-intel/vulnerabilities/id/0c2266b8-cc23-46de-bc80-09e3d6294854?source=cve\",\"source\":\"security@wordfence.com\"}]}}"
  }
}



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