source: http://www.securityfocus.com/bid/9475/info

It has been reported that Netbus may be prone to a a directory listings disclosure and file upload vulnerability that may allow and attacker to disclose sensitive information and the possibility of corrupting files on the system or placing files such as malicious files in directories where they may be interpreted.

Netbus Pro has been reported to be vulnerable to this issue. 

http://www.example.com//
http://www.example.com/./