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8.8
GetSimple CMS massiveAdmin Plugin Allows Admin to Overwrite Configuration File
CVE-2026-28495
Summary
The massiveAdmin plugin in GetSimple CMS v3.3.22 allows an authenticated administrator to accidentally or intentionally make changes to the configuration file. This could lead to unintended changes to the website's settings or even allow an attacker to inject malicious code. Update to the latest version of the plugin and the GetSimple CMS to fix this issue.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| getsimple-ce | getsimple_cms | <= 3.3.22 | – |
Original title
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...
Original description
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.
nvd CVSS3.1
9.6
Vulnerability type
CWE-352
Cross-Site Request Forgery (CSRF)
Published: 10 Mar 2026 · Updated: 13 Mar 2026 · First seen: 10 Mar 2026