SolarWinds Serv-U FTP Server 15.1.6 allows remote authenticated users to execute arbitrary code by leveraging the Import feature and modifying a CSV file.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2018-7762
http://www.securityfocus.com/bid/106844
http://seclists.org/fulldisclosure/2019/Feb/4
http://packetstormsecurity.com/files/151473/SolarWinds-Serv-U-FTP-15.1.6-Privilege-Escalation.html