Jelsoft vBulletin accepts uploads of Cascading Style Sheets (CSS) and processes them in a way that allows remote authenticated administrators to gain shell access by uploading a CSS file that contains PHP code, then selecting the file via the style chooser, which causes the PHP code to be executed. NOTE: the vendor was unable to reproduce this issue in 3.5.x. NOTE: this issue might be due to direct static code injection.

SQL injection vulnerability in calendar.php in vBulletin 3.0.x allows remote attackers to execute arbitrary SQL commands via the eventid parameter. NOTE: the affected version has been disputed by the vendor. It appears that this is the same issue as CVE-2004-0036, which was fixed in 2.3.4.

PHP remote file inclusion vulnerability in VBulletin 3.5.1, 3.5.2, and 3.5.4 allows remote attackers to execute arbitrary code via a URL in the systempath parameter to (1) ImpExModule.php, (2) ImpExController.php, and (3) ImpExDisplay.php.

Cross-site scripting (XSS) vulnerability in vBulletin 3.0.12 and 3.5.3 allows remote attackers to inject arbitrary web script or HTML via the email field, which is injected in profile.php but not sanitized in sendmsg.php.

Cross-site scripting (XSS) vulnerability in vBulletin 3.5.2, and possibly earlier versions, allows remote attackers to inject arbitrary web script or HTML via the title of an event, which is not properly filtered by (1) calendar.php and (2) reminder.php.

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.

Multiple SQL injection vulnerabilities in vBulletin 3.0.7 and earlier allow remote attackers to execute arbitrary SQL commands via the (1) announcement parameter to announcement.php, the (2) thread[forumid] or (3) criteria parameters to thread.php, (4) userid parameter to user.php, the (5) calendarcustomfieldid, (6) calendarid, (7) moderatorid, (8) holidayid, (9) calendarmoderatorid, or (10) calendar[0] parameters to admincalendar.php, (11) the cronid parameter to cronlog.php, (12) user[usergroupid][0] parameter to email.php, (13) help[0] parameter to help.php, the (14) limitnumber or (15) limitstart parameter to user.php, the (16) usertitleid or (17) ids parameters to usertitle.php, (18) rvt[0] parameter to language.php, (19) keep[0] parameter to phrase.php, (20) dostyleid parameter to template.php, (21) thread[forumid] parameter to thread.php, or (22) usertools.php.

Multiple cross-site scripting (XSS) vulnerabilities in vBulletin 3.0.9 and earlier allow remote attackers to inject arbitrary web script or HTML via certain arguments to (1) announcement.php, (2) admincalendar.php, (3) bbcode.php, (4) cronadmin.php, (5) email.php, (6) faq.php, (7) forum.php, (8) image.php, (9) language.php, (10) ranks.php, (11) replacement.php, (12) replacement.php, (13) template.php, (14) template.php, (15) usergroup.php, or (16) usertitle.php.

image.php in vBulletin 3.0.9 and earlier allows remote attackers with access to the administrator panel to upload arbitrary files via the upload action.

Multiple cross-site scripting (XSS) vulnerabilities in vBulletin before 3.0.9 allow remote attackers to inject arbitrary web script or HTML via the (1) group parameter to css.php, (2) redirect parameter to index.php, (3) email parameter to user.php, (4) goto parameter to language.php, (5) orderby parameter to modlog.php, and the (6) hex, (7) rgb, or (8) expandset parameter to template.php.