Problem:
JelSoft vBulletin is prone to attack in six different files (maybe more)
The files affected are "showthread.php", "forumdisplay.php", "private.php"
and also the "memberlist.php" file. The "memberlist.php" and "private.php"
files 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 alot of times slashes will be added to certain characters, or certain
strings/characters disallowed, but in vBulletin you can eneter pretty much
anything and have it execute sucessfully. 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" and "private.php" issues only seems to affect versions prior
to 3.0, but the others affect all versions.
Update: March 19, 2022
Seems that also the modcp and admincp login pages are vuln to XSS too.
showthread.php?t=[VID]&page;=[INT][XSS]
forumdisplay.php?f=[VID]&page;=[INT]&sort;=lastpostℴ=[XSS]
private.php?&action;=newmessage&userid;=[UID]&forward;=[XSS]
memberlist.php?action=getall&what;=[XSS]<r=&perpage;=25&orderby;=username
admincp/index.php?vb_login_username=[XSS]
modcp/index.php?vb_login_username=[XSS]
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GulfTech Computers - Professional Computer Services 
