CVE-2026-66399
MEDIUMphpMyFAQ before 4.1.6 Privilege Escalation via Group Membership
Title source: cnaDescription
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.
References (2)
Core 2
Core References
Third Party Advisory third-party-advisory
VulnCheck Advisory: phpMyFAQ before 4.1.6 Privilege Escalation via Group Membership
https://www.vulncheck.com/advisories/phpmyfaq-before-privilege-escalation-via-group-membership
Vendor Advisory vendor-advisory
GitHub Security Advisory (GHSA-28cc-v39j-vr95)
https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-28cc-v39j-vr95
Scores
CVSS v3
6.5
EPSS
0.0023
EPSS Percentile
14.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-269
Status
published
Products (2)
thorsten/phpMyFAQ
< 4.1.6
thorsten/phpMyFAQ
4.1.6
Published
Jul 27, 2026
Tracked Since
Jul 27, 2026