FUEL CMS 1.4.1 allows PHP Code Evaluation via the pages/select/ filter parameter or the preview/ data parameter. This can lead to Pre-Auth Remote Code Execution.
packetstormsecurity.com/files/153696/fuelCMS-1.4.1-Remote-Code-Execution.html
packetstormsecurity.com/files/160080/Fuel-CMS-1.4-Remote-Code-Execution.html
packetstormsecurity.com/files/164756/Fuel-CMS-1.4.1-Remote-Code-Execution.html
0xd0ff9.wordpress.com/2019/07/19/from-code-evaluation-to-pre-auth-remote-code-execution-cve-2018-16763-bypass/
github.com/daylightstudio/FUEL-CMS/issues/478
www.exploit-db.com/exploits/47138