https://codecanyon.net/item/best-support-systemclient-support-desk-help-centre/21357317
https://medium.com/@ex.mi/php-best-support-system-v3-0-4-authenticated-persistent-xss-dfe6d4a06f75
https://ex-mi.ru/exploit/[2020-08-23]-[PHP]-best-support-system-v3.0.4.txt
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24963
https://www.youtube.com/watch?v=Lz0-WWbw2Sw