SQL injection vulnerability in global.php in Jelsoft vBulletin 2.x allows remote attackers to execute arbitrary SQL commands via the templatesused parameter.
Cross-site scripting (XSS) vulnerability in the editavatar page in vBulletin 3.5.1 allows remote attackers to inject arbitrary web script or HTML via a URL in the remote avatar url field, in which the URL generates a parsing error, and possibly requiring a trailing extension such as .jpg.