Multiple cross-site scripting (XSS) vulnerabilities in HESK before 2.4.1 allow remote attackers to inject arbitrary web script or HTML via the (1) hesk_settings[tmp_title] or (2) hesklang[ENCODING] parameter to inc/header.inc.php; the hesklang[attempt] parameter to (3) inc/assignment_search.inc.php, (4) inc/attachments.inc.php, (5) inc/common.inc.php, (6) inc/database.inc.php, (7) inc/prepare_ticket_search.inc.php, (8) inc/print_tickets.inc.php, (9) inc/show_admin_nav.inc.php, (10) inc/show_search_form.inc.php, or (11) inc/ticket_list.inc.php; or (12) the PATH_INFO to language/en/text.php.