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Vulnerability record · CVE-2026-88959 · published 10 September 2026

CVE-2026-88959: Missing authorization vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.52% · top 57.9% CWE-862 · Missing authorization Deferred
8.7CVSS 4.0 base score
0.52%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
11 Sep 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
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-u

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Source: NIST National Vulnerability Database (record CVE-2026-88959), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.