CVE-2026-76213
phpMyFAQ before 4.1.7 2FA Brute-Force via Session-Scoped Throttle
- State
- Published
- Severity
- 9.1 Critical
- Published
- Aug 19, 2026
- Updated
- Aug 19, 2026
- Reserved
- Aug 19, 2026
Description
phpMyFAQ before 4.1.7 contains a brute-force vulnerability in the two-factor authentication step where the failure counter is session-scoped and reset on each successful password re-authentication. Attackers with a valid password can bypass the five-attempt limit by obtaining a fresh session cookie and repeatedly re-authenticating to reset the counter, enabling unbounded TOTP code guessing.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.1 Critical | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.4 High | CVSS:3.1/AV:N/AC:H/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 |
|
References
- GitHub Security Advisory (GHSA-f98m-hcjv-7rp9)vendor-advisory
- VulnCheck Advisory: phpMyFAQ before 4.1.7 2FA Brute-Force via Session-Scoped Throttlethird-party-advisory
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