Auth bypass in Thorsten Phpmyfaq
CVE-2026-56737
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Thorsten Phpmyfaq — versions >= 3.2.0, < 4.1.6
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-56737?
- CVE-2026-56737 is a high-severity vulnerability in Thorsten Phpmyfaq, classified under Improper Authentication. CVSS score: 8.1/10. Published 2026-09-24.
- How severe is CVE-2026-56737?
- High severity. CVSS v3 base score is 8.1 out of 10.