CVE-2026-56737

Description

phpMyFAQ is an open source FAQ web application. Versions 3.2.0 through 4.1.5 contain an authentication bypass in its public two-factor authentication verification flow: an unauthenticated attacker can submit an account’s numeric user ID and a valid or brute-forced six-digit TOTP code without first authenticating with the account password, allowing takeover of any 2FA-enabled account, including administrator accounts. Version 4.1.6 is patched by binding TOTP verification to a session established after successful password authentication and limiting failed TOTP attempts. No official workaround is documented; affected installations should upgrade to 4.1.6 or later.

CVSS Vector

References

• https://github.com/thorsten/phpMyFAQ/commit/410208b90f1d01534812ac5203d3e8d9c7bd591f
• https://github.com/thorsten/phpMyFAQ/commit/5097dff341fb01e93e8561e7261b3ae657df715a
• https://github.com/thorsten/phpMyFAQ/commit/6a69f6e2142fde722165c65b7e0a49f3176e87be
• https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-8gpw-xvpf-hvx5