PT-2026-65000 · Thorsten · Phpmyfaq

Geo-Chen · CVE-2026-66399 · Published 2026-07-27 · Updated 2026-07-27

Mitre

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

phpMyFAQ before 4.1.6 contains a privilege escalation vulnerability in GroupController::updateMembers() that allows administrators with only group-management permissions to join privileged groups without verification of required rights. Attackers can add themselves to pre-existing groups holding user-management rights and immediately inherit those permissions to modify or delete user accounts.

Fix

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

CVE-2026-66399

Affected Products

Phpmyfaq

References · 3

• https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-28cc-v39j-vr95 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-66399 · Security Note
• https://vulncheck.com/advisories/phpmyfaq-before-privilege-escalation-via-group-membership · Note