CVE-2026-28495

critical · 9.6

GetSimple CMS is a content management system. The massiveAdmin plugin (v6.0.3) bundled with GetSimpleCMS-CE v3.3.22 allows an authenticated administrator to overwrite the gsconfig.php configuration file with arbitrary PHP code via the gsconfig editor module. The form lacks CSRF protection, enabling a remote unauthenticated attacker to exploit this via Cross-Site Request Forgery against a logged-in admin, achieving Remote Code Execution (RCE) on the web server.

9.6

CVSS

0.3%

EPSS (exploit prob.)

22nd

EPSS percentile

2026-03-10

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Weaknesses

CWE-352

Affected products

Vendor	Product	Affected versions
getsimple-ce	getsimple_cms	<= 3.3.22

Check a specific version with /api/v1/cve/match.

References

https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/security/advisories/GHSA-92wv-q2jp-qg88

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-28495