Multiple cross-site scripting (XSS) vulnerabilities in vBulletin 3.6.10 PL2 and earlier, and 3.7.2 and earlier 3.7.x versions, allow remote attackers to inject arbitrary web script or HTML via (1) the PATHINFO (PHPSELF) or (2) the do parameter, as demonstrated by requests to upload/admincp/faq.php. NOTE: this issue can be leveraged to execute arbitrary PHP code.