What’s Vulnerable › Vulnerabilities

CVE-2026-111886: phpMyFAQ 4.2.0-alpha.2 before 4.2.0-beta 2FA Brute-Force via remove-twofactor Endpoint

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-17 · updated 2026-10-18
• Weakness: CWE-307

Description

phpMyFAQ from 4.2.0-alpha.2 before 4.2.0-beta lacks brute-force lockout in the removeTwofactorConfig() 2FA removal endpoint, allowing authenticated attackers to guess TOTP codes without limit. Attackers holding a hijacked session and CSRF token can repeatedly POST guesses to /api/user/remove-twofactor to permanently disable the victim's 2FA.

Affected products

• thorsten phpMyFAQ: from 4.2.0-alpha.2 before 4.2.0-beta — fixed in 4.2.0-beta

How to fix

Upgrade to a fixed version: thorsten phpMyFAQ 4.2.0-beta. Check the vendor advisory for mitigations.

References

• https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-7pjw-6v4g-f837
• https://www.vulncheck.com/advisories/phpmyfaq-4.2.0-alpha.2-before-4.2.0-beta-2fa-brute-force-via-remove-twofactor-endpoint
• https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-7pjw-6v4g-f837

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