CVE-2026-111909
8.1HighPublished 17 Oct 2026 · NVD status: Deferred · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Impact
- High impact on integrity, availability
- Weakness
- CWE-269
Impact
Authenticated low-level admins can delete superadmin accounts, causing service lockout and destroying audit trails. The attacker needs an existing user account with the delete_user permission.
Root cause
The deleteUser() API fails to check whether the target account is a superadmin before processing the deletion request for user IDs other than 1.
Affected systems
phpMyFAQ before 4.1.9
CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Fix & remediation
Upgrade to phpMyFAQ 4.1.9 or later. If upgrading must wait, revoke the 'delete_user' permission from all non-superadmin accounts or block DELETE requests to /admin/api/user/delete at the web server.
$ composer update phpmyfaq/phpmyfaqAI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
phpMyFAQ before 4.1.9 contains a missing authorization vulnerability in the deleteUser() API that allows authenticated non-superadmin users with delete_user permission to delete superadmin accounts. Attackers can send a DELETE request to /admin/api/user/delete with a superadmin's userId other than 1, removing administrative access and accountability.