Authorization bypass through user-controlled key in phpMyFAQ - #VU131753
Published: May 18, 2026
Vulnerability identifier: #VU131753
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Thorsten Rinne
Affected software:
phpMyFAQ
phpMyFAQ
Detailed vulnerability description
The vulnerability allows a remote user to escalate privileges and take over arbitrary accounts.
The vulnerability exists due to authorization bypass through a user-controlled key in the overwritePassword() method of the admin API user controller when handling PUT requests to the /admin/api/user/overwrite-password endpoint. A remote user can modify the userId value in the request body to escalate privileges and take over arbitrary accounts.
Exploitation requires an authenticated admin session with USER_EDIT permission and a valid CSRF token.
Remediation
Install security update from vendor's website.