CVE-2026-45010

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

State: Published
Severity: 9.3 Critical
Published: May 15, 2026
Updated: May 28, 2026
Reserved: May 8, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	9.3 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N	VulnCheck
3.1	9.1 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N	VulnCheck

Weaknesses

CWE-307 Improper Restriction of Excessive Authentication Attempts

Affected Products

Product	Versions
phpmyfaqthorsten	before 4.1.2Affected 4.1.2Not affected

References

GHSA Advisory GHSA-9pq7-mfwh-xx2jvendor-advisory
VulnCheck Advisory: phpMyFAQ - Unauthenticated Two-Factor Authentication Brute-Force via /admin/check Endpointthird-party-advisory

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