Multiple cross-site scripting (XSS) vulnerabilities in 427BB 2.3.1 allow remote attackers to inject arbitrary web script or HTML via the (1) PATH_INFO to (a) register.php, (b) reminder.php, and (c) search.php; the (2) uname, (3) email, and (4) email2 parameters to register.php; the (5) email parameter to reminder.php; and the (6) keywords parameter to search.php.