CVE-2026-27146 GetSimple CMS: Cross-Site Request Forgery (CSRF) in File Upload Allows Arbitrary Uploads
Attackers can trick authenticated admins into uploading arbitrary files via CSRF, potentially leading to 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-2026-27146?
CVE-2026-27146 is a high-severity vulnerability in GetSimpleCMS-CE, published on 20 Feb 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. All versions of GetSimple CMS do not implement CSRF protection on the administrative file upload endpoint. As a result, an attacker can craft a malicious web page that silently triggers a file upload request from an authenticated victim’s browser. The request is accepted without requiring a CSRF token or origin validation. This allows an attacker to upload arbitrary files to the application without the victim’s knowledge or consent. In order to exploit this vulnerability, the victim must be authenticated to GetSimple CMS (e.g., admin user), and visit an attacker-controlled webpage. This issue does not have a fix at the time of publication.
Which versions are affected by CVE-2026-27146?
It affects 1 product.
Products include Getsimple-Ce Getsimple Cms.
How do I fix CVE-2026-27146?
No fix has been published for CVE-2026-27146 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-27146 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27146 exists.
Other vulnerabilities in GetSimpleCMS-CE
- CVE-2024-55085 Code injection in n/a
- CVE-2026-28495 GetSimple CMS has CSRF to Remote Code Execution via Arbitrary PHP Write in gsconfig.php
- 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
Sources
Also known as GHSA-26rv-8wpp-q84r.