LiquidFiles before 3.6.3 allows remote attackers to elevate their privileges from Admin (or User Admin) to Sysadmin.
https://man.liquidfiles.com/release_notes/version_3-6-x.html
https://forum.liquidfiles.com/forums/news.6/
http://seclists.org/fulldisclosure/2021/Nov/52
http://seclists.org/fulldisclosure/2021/Nov/40
http://packetstormsecurity.com/files/164997/LiquidFiles-3.5.13-Privilege-Escalation.html