Executive Summary

Concrete CMS versions 9.5.0 and below have a vulnerability in the bulk_user_assignment.php component where authorization checks are missing.

This flaw allows any authenticated user who can access the bulk user assignment dashboard page to escalate their privileges.

Specifically, such a user can add any user email to any group, including administrative groups, and can also remove legitimate administrators.

Useful 0 Not Useful 0

Impact Analysis

The vulnerability can lead to privilege escalation, allowing an attacker with basic authenticated access to gain administrative control.

This means unauthorized users could manipulate user group memberships, potentially removing legitimate admins and adding unauthorized users to privileged groups.

Such unauthorized administrative access can compromise the security and integrity of the CMS, leading to further exploitation or data breaches.

Useful 0 Not Useful 0