Authentication Bypass in phpMyFAQ User Control Panel API by phpMyFAQ
CVE-2026-85591

7.1HIGH

Key Information:

Vendor

Thorsten

Status
pHPMyFAQ
Vendor
CVE Published:
4 September 2026

What is CVE-2026-85591?

An authentication bypass vulnerability has been detected in the user control panel API endpoint of phpMyFAQ versions prior to 4.1.8. This issue allows authenticated attackers to alter account passwords without the need to verify the current password. By submitting a PUT request to the user data update endpoint, including only a CSRF token, attackers are able to change any user's password, inclusive of administrative accounts, leading to irreversible account takeovers and potential lockouts for victims. It is crucial for users to upgrade to the latest version to mitigate this risk.

Affected Version(s)

phpMyFAQ 0 < 4.1.8

phpMyFAQ 4.1.8

References

https://github.com/thorsten/phpMyFAQ/security/advisories/...
vendor-advisory
https://www.vulncheck.com/advisories/phpmyfaq-before-4.1....
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

skeletonsec
.