Directory traversal vulnerability in CesarFTP 0.98b and earlier allows remote authenticated users (such as anonymous) to read arbitrary files via a GET with a filename that contains a ...%5c (modified dot dot).
https://euvd.enisa.europa.eu/vulnerability/EUVD-2001-1316
http://www.securityfocus.com/bid/2786
http://www.iss.net/security_center/static/6606.php
http://archives.neohapsis.com/archives/bugtraq/2001-05/0252.html