CVE-2026-76213 thorsten CVE debrief

Who should care

Organizations and users of phpMyFAQ versions prior to 4.1.7 should be aware of this critical vulnerability and take immediate action to patch or upgrade their installations. This vulnerability affects operators who manage phpMyFAQ deployments, platform administrators responsible for security configurations, and security teams that monitor for potential threats. Immediate attention is required to prevent potential brute-force attacks on two-factor authentication mechanisms.

Technical summary

phpMyFAQ before 4.1.7 contains a brute-force vulnerability in the two-factor authentication step. The failure counter is session-scoped and reset on each successful password re-authentication, allowing attackers with valid passwords to bypass the five-attempt limit by obtaining a fresh session cookie and repeatedly re-authenticating to reset the counter, enabling unbounded TOTP code guessing. This vulnerability can lead to unauthorized access and potential data breaches if not properly addressed.

Defensive priority

Organizations using phpMyFAQ should prioritize patching to prevent potential brute-force attacks on two-factor authentication.

Recommended defensive actions

• Apply patches or upgrade to phpMyFAQ version 4.1.7 or later
• Implement additional security measures to monitor and limit authentication attempts
• Review and adjust session management and two-factor authentication configurations
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE description indicates a critical vulnerability in phpMyFAQ before version 4.1.7, allowing attackers with valid passwords to bypass the five-attempt limit for TOTP code guessing by obtaining a fresh session cookie and re-authenticating. The NVD entry is currently Analyzed. Further verification is needed to assess the full impact and to confirm affected deployments. Defenders should review official advisories and monitor for potential exploitation attempts.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.