source: https://www.securityfocus.com/bid/60760/info

FtpLocate is prone to an HTML-injection vulnerability because it fails to properly sanitize user-supplied input.

Successful exploits will allow attacker-supplied HTML and script code to run in the context of the affected browser, potentially allowing the attacker to steal cookie-based authentication credentials or to control how the site is rendered to the user. Other attacks are also possible.

FtpLocate 2.02 is vulnerable; other versions may also be affected. 

http://www.example.com/cgi-bin/ftplocate/flsearch.pl?query=FTP&fsite=<script>alert('xss')</script>