Multiple cross-site scripting (XSS) vulnerabilities in admincp/index.php in Jelsoft vBulletin 3.6.x allow remote attackers to inject arbitrary web script or HTML via (1) the prefs parameter in a buildnavprefs action or (2) the navprefs parameter in a savenavprefs action.

Cross-site scripting (XSS) vulnerability in Jelsoft vBulletin allows remote attackers to inject arbitrary web script or HTML via an SWF file that uses ActionScript to trigger execution of JavaScript.

Cross-site scripting (XSS) vulnerability in Jelsoft vBulletin 3.5.4 and 3.6.0 allows remote attackers to inject arbitrary web script or HTML by uploading an attachment with a .pdf extension that contains JavaScript, which is processed as script by Microsoft Internet Explorer 6.

SQL injection vulnerability in inlinemod.php in Jelsoft vBulletin before 3.5.8, and before 3.6.5 in the 3.6.x series, might allow remote authenticated users to execute arbitrary SQL commands via the postids parameter. NOTE: the vendor states that the attack is feasible only in circumstances "almost impossible to achieve."