Type packetstorm
Reporter James Bercegay
Modified 2004-03-17T00:00:00


Vendor : Jelsoft Enterprises  
URL :  
Version : vBulletin 3.0.0 RC4 && Others  
Risk : Cross Site Scripting  
vBulletin is a powerful, scalable and fully customisable forums package   
for your web site. Based on the PHP language, backed with a blisteringly   
fast MySQL back-end database, vBulletin is the ideal community solution   
for all medium-to-large sites.  
Cross Site Scripting:  
JelSoft vBulletin is prone to attack in three different files (maybe more)  
The files affected are "showthread.php", "forumdisplay.php", and also the  
"memberlist.php" file. The "memberlist.php" does not seem to be prone to  
the same attack I am about to talk about in versions three and later. The  
type of XSS that takes place though on vBulletin is what I would call a  
higher risk XSS issue. What I mean by that is a lot of times slashes will  
be added to certain characters, or certain strings/characters disallowed,  
but in vBulletin you can enter pretty much anything and have it execute  
successfully. This makes it a whole lot easier for an attacker to use these  
vulnerabilities to disclose a users information. Below are examples of the  
issues I have talked about here. Remember, the "memberlist.php" issue only  
seems to affect versions prior to 3.0, but the others affect all versions.  
JelSoft were notified and there will probably be a release of a patch or  
update to resolve these issues. Who knows, they might even charge you for  
the upgrade also :P heheh  
Credits go to JeiAr of the GulfTech Security Research Team.