SolarWinds Serv-U before 15.2.2 allows Authenticated Directory Traversal.
https://www.themissinglink.com.au/security-advisories-cve-2020-27994
http://seclists.org/fulldisclosure/2021/Feb/36
http://packetstormsecurity.com/files/161399/SolarWinds-Serv-U-FTP-Server-15.2.1-Path-Traversal.html