Multiple cross-site scripting (XSS) vulnerabilities in ACP3 4.0 beta 3 allow remote attackers to inject arbitrary web script or HTML via (1) the form[mail] parameter to contact/contact/index.php; the (2) form[mods][] or (3) form[search_term] parameter to search/list/action_search/index.php; (4) the id parameter to modules/dl/download.php; (5) the form[cat] parameter to news/list/index.php; the (6) form[cat], (7) form[name], or (8) form[message] parameter to certain news/details/id_*/action_create/index.php files; or (9) the form[mail] parameter to newsletter/create/index.php.