Cross-site scripting (XSS) vulnerability in Link Up Gold 2.5 and earlier allows remote attackers to inject arbitrary web script or HTML via (1) link parameter to tell_friend.php, (2) phrase[] parameter to search.php in a search_links_advanced action, and the (3) direction or (4) sort parameter to articles.php.
http://www.vupen.com/english/advisories/2005/2884
http://www.securityfocus.com/bid/15843