Missing Authorization in phpMyFAQ Allows Unauthorized Account Deletion by Non-Superadmin Users
CVE-2026-111909

7.2HIGH

Key Information:

Vendor

Thorsten

Status
pHPMyFAQ
Vendor
CVE Published:
17 October 2026

What is CVE-2026-111909?

In phpMyFAQ versions before 4.1.9, a missing authorization vulnerability exists within the deleteUser() API that permits authenticated users, who have delete_user permissions but are not superadmins, to delete superadmin accounts. This vulnerability allows these users to send a DELETE request to the API endpoint /admin/api/user/delete, targeting a superadmin's user ID other than 1, effectively stripping the superadmin of their administrative rights and compromising accountability within the application.

Affected Version(s)

phpMyFAQ 0 < 4.1.9

phpMyFAQ 4.1.9

References

https://github.com/thorsten/phpMyFAQ/security/advisories/...
vendor-advisory
https://www.vulncheck.com/advisories/phpmyfaq-before-4.1....
third-party-advisory

CVSS V4

Score:
7.2
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Sultan0f1
.