CVE-2026-88959: Anchor CMS through 0.12.7 Privilege Escalation via Missing Authorization on Admin User-Management Endpoints
Anchor CMS through 0.12.7 fails to enforce role-based access control in admin user-management endpoints, allowing any authenticated low-privilege user to create administrator accounts or modify existing ones. Attackers with editor or user roles can POST directly to admin/users/add or admin/users/edit endpoints to create new administrator accounts or change the existing administrator's password, gaining full administrative access.
Affected Software
Event History
Frequently Asked Questions
Who is exposed to this issue?
Any Anchor CMS deployment through 0.12.7 with authenticated accounts assigned editor or user roles is exposed. Those low-privilege users can access the affected user-management endpoints directly.
What does an attacker need to exploit it?
The attacker needs valid credentials for a low-privilege authenticated account, such as an editor or user. No user interaction is required, and the attacker can send POST requests to the admin/users/add or admin/users/edit endpoints.
What access can exploitation provide?
An attacker can create a new administrator account or modify an existing administrator account, including changing its password. This results in full administrative access to the CMS.