Vulnerability · Published May 15, 2026 · Assigned by VulnCheck

CVE-2026-45010phpMyFAQ - Unauthenticated Two-Factor Authentication Brute-Force via /admin/check Endpoint

Critical 9.1

In plain English

A critical-severity security flaw in phpmyfaq from thorsten. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)0.4%top 62.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

phpMyFAQ before 4.1.2 contains an improper restriction of excessive authentication attempts vulnerability in the /admin/check endpoint, which accepts arbitrary user-id parameters without session binding or rate limiting. Unauthenticated attackers can brute-force any user's six-digit TOTP code by submitting POST requests with sequential token values, bypassing two-factor authentication to gain full administrative access.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	phpmyfaq/phpmyfaq	4.1.2	GHSA-9pq7-mfwh-xx2j
Packagist	thorsten/phpmyfaq	4.1.2	GHSA-9pq7-mfwh-xx2j

Affected products (as reported)

Vendor	Product	Versions
thorsten	phpmyfaq	0 – before 4.1.2

Weakness: CWE-307 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

GHSA Advisory GHSA-9pq7-mfwh-xx2j vendor-advisory
VulnCheck Advisory: phpMyFAQ - Unauthenticated Two-Factor Authentication Brute-Force via /admin/check Endpoint third-party-advisory