What’s Vulnerable › Vulnerabilities

CVE-2026-88959: Anchor CMS through 0.12.7 Privilege Escalation via Missing Authorization on Admin User-Management Endpoints

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-10 · updated 2026-09-11
• Weakness: CWE-862

Description

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 products

• anchorcms Anchor CMS: through 0.12.7

References

• https://gist.github.com/bozorovab2009-spec/57931237f774b78333f8fe47e84ec4aa
• https://github.com/anchorcms/anchor-cms
• https://github.com/anchorcms/anchor-cms/blob/0.12.7/anchor/routes/users.php
• https://www.vulncheck.com/advisories/anchor-cms-through-0.12.7-privilege-escalation-via-missing-authorization-on-admin-user-management-endpoints

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