Multiple cross-site scripting (XSS) vulnerabilities in MyBulletinBoard (MyBB) 1.00 RC4 and earlier allow remote attackers to execute arbitrary web script or HTML via the (1) forums, (2) version, or (3) limit parameter to misc.php, (4) page or (5) datecut parameter to forumdisplay.php, (6) username, (7) email, or (8) email2 parameter to member.php, (9) page or (10) usersearch parameter to memberlist.php, (11) pid or (12) tid parameter to showthread.php, or (13) tid parameter to printthread.php.