CSRF in Getsimple-Ce Getsimple Cms
CVE-2026-28495
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.
Vulnerability class: CSRF (Cross-Site Request Forgery)
EPSS: 0.003 (21.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.
Affected products
- Getsimple-ce Getsimple_cms
- Getsimplecms-ce — versions <= 3.3.22
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-28495?
- CVE-2026-28495 is a critical-severity vulnerability in Getsimple-Ce Getsimple Cms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 9.6/10. Published 2026-03-10.
- How severe is CVE-2026-28495?
- Critical severity. CVSS v3 base score is 9.6 out of 10.