CVE-2026-28495GetSimple CMS has CSRF to Remote Code Execution via Arbitrary PHP Write in gsconfig.php
Updated under an hour ago ()
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It affects GetSimpleCMS-CE and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.7 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-352
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Mar 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
GetSimpleCMS-CE GetSimpleCMS-CE getsimplecms_ce:getsimplecms_ce (from the name) | through 3.3.22 | CNA record |
getsimple-ce getsimple_cms getsimple-ce:getsimple_cms | through 3.3.22 | NVD |
References
- https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/security/advisories/GHSA-92wv-q2jp-qg88x-refsource-confirm, exploit, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.