Multiple cross-site scripting (XSS) vulnerabilities in ATutor 1.4.3 and 1.5 RC 1 allow remote attackers to inject arbitrary web script or HTML via the (1) show_course parameter to browse.php, (2) subject parameter to contact.php, (3) cid parameter to content.php, (4) l parameter to inbox/send_message.php, the (5) search, (6) words, (7) include, (8) find_in, (9) display_as, or (10) search parameter to search.php, the (11) submit, (12) query, or (13) field parameter to tile.php, the (14) us parameter to forum/subscribe_forum.php, or the (15) roles[], (16) status, (17) submit, or (18) reset_filter parameters to directory.php.