CVE-2026-57996

Description

phpMyFAQ before 4.1.5 contains a privilege escalation vulnerability in the user/add API endpoint that allows non-SuperAdmin administrators to create SuperAdmin accounts. A delegated administrator with USER_ADD/EDIT/DELETE permissions can call POST /admin/api/user/add with isSuperAdmin: true and attacker-chosen credentials to create a SuperAdmin account, then authenticate as that account to achieve full instance takeover.

CVSS Vector

References

• https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-r2f4-v277-hvw9
• https://www.vulncheck.com/advisories/phpmyfaq-privilege-escalation-via-missing-superadmin-guard-in-user-add-endpoint