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Vulnerabilities CVE-2026-66399

CVE-2026-66399

High
Open
TLP:CLEAR

phpMyFAQ before 4.1.6 Privilege Escalation via Group Membership

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Description

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.

Details

CVSS Score
8.5
EPSS Score
0.23%

14th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Confidence
90%
Published
Jul 27, 2026
Last Modified
Jul 28, 2026
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