GetSimple CMS Custom JS 0.1 CSRF / XSS / Code Execution

Posted on 04 May 2021

The Custom JS plugin version 0.1 for GetSimple CMS suffers from a cross site request forgery vulnerability that allows remote unauthenticated attackers to inject arbitrary client-side code into authenticated administrators browsers, which results in remote code execution on the hosting server, when an authenticated administrator visits a malicious third party website.