ftp.pl CGI program for Virtual Visions FTP browser allows remote attackers to read directories outside of the document root via a .. (dot dot) attack.
https://exchange.xforce.ibmcloud.com/vulnerabilities/5187
https://euvd.enisa.europa.eu/vulnerability/EUVD-2000-0670
http://www.securityfocus.com/bid/1471
http://archives.neohapsis.com/archives/bugtraq/2000-07/0177.html