GetSimple CMS Custom JS 0.1 - CSRF to XSS to RCE

Vulnerability Description

GetSimple CMS Custom JS 0.1 plugin contains a cross-site request forgery vulnerability that allows unauthenticated attackers to inject arbitrary client-side code into administrator browsers. Attackers can craft a malicious website that triggers a cross-site scripting payload to execute remote code on the hosting server when an authenticated administrator visits the page.

References

• https://www.exploit-db.com/exploits/49816
• http://get-simple.info
• https://github.com/GetSimpleCMS/GetSimpleCMS
• https://github.com/boku7/gsCMS-CustomJS-Csrf2Xss2Rce
• https://www.exploit-db.com/exploits/49712
• https://www.vulncheck.com/advisories/getsimple-cms-custom-js-csrf-to-xss-to-rce