Auth bypass in Anchorcms Anchor Cms
CVE-2026-88959
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.
Vulnerability class: Broken Access Control
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (third-party-advisory)
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-88959?
- CVE-2026-88959 is a high-severity vulnerability in Anchorcms Anchor Cms, classified under Missing Authorization. CVSS score: 8.8/10. Published 2026-09-10.
- How severe is CVE-2026-88959?
- High severity. CVSS v3 base score is 8.8 out of 10.