CVE 2005-4231

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.

See the CVE page on Mitre.org for more details.