Privilege Escalation in phpMyFAQ via Group Membership Manipulation

Executive Summary

This is a privilege escalation vulnerability in phpMyFAQ versions before 4.1.6. It exists in the GroupController::updateMembers() function where administrators with only group-management permissions can add themselves to privileged groups without proper verification. This allows them to inherit user-management rights and modify or delete user accounts.

Useful 0 Not Useful 0

Detection Guidance

To detect this vulnerability, check if your phpMyFAQ version is 4.1.5 or earlier. Verify if administrators with group-management permissions can add themselves to privileged groups without proper authorization checks. Review GroupController::updateMembers() function for missing rights validation.

Useful 0 Not Useful 0

Impact Analysis

An attacker with group-management permissions could escalate privileges to gain user-management rights. This would let them modify or delete user accounts, potentially leading to unauthorized access, data loss, or system compromise depending on the application's use case.

Useful 0 Not Useful 0

Compliance Impact

This vulnerability could lead to unauthorized access or modification of sensitive user data, violating confidentiality and integrity requirements in GDPR and HIPAA. Organizations using affected phpMyFAQ versions may face compliance violations, data breaches, and potential regulatory penalties.

Useful 0 Not Useful 0

Mitigation Strategies

Immediately upgrade phpMyFAQ to version 4.1.6 or later to patch the vulnerability in GroupController::updateMembers(). Review group memberships for unauthorized additions to privileged groups and remove any suspicious accounts.

Useful 0 Not Useful 0