CVE-2026-28495 GetSimple CMS has CSRF to Remote Code Execution via Arbitrary PHP Write in gsconfig.php
A CSRF vulnerability in the massiveAdmin plugin allows attackers to force admins to write arbitrary PHP code, leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-28495?
CVE-2026-28495 is a critical vulnerability in GetSimpleCMS-CE, published on 10 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-352
Which versions are affected by CVE-2026-28495?
It affects 1 product.
Products include Getsimple-Ce Getsimple Cms.
How do I fix CVE-2026-28495?
No fix has been published for CVE-2026-28495 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-28495 being exploited?
There is no known exploitation of CVE-2026-28495 in the wild and no public exploit code.
Other vulnerabilities in GetSimpleCMS-CE
- CVE-2024-55085 Code injection in n/a
- CVE-2026-27202 GetSimple CMS: Uploaded Files (feature) Arbitrary File Read Vulnerability
- CVE-2024-55088 Server-side request forgery in n/a
- CVE-2026-27161 Unauthenticated Information Disclosure via .htaccess Reliance in Sensitive Directories
- CVE-2025-48492 GetSimple CMS RCE in Edit component
Sources
Also known as GHSA-92wv-q2jp-qg88.