TITLE:
ExBB Nested BBcode Script Insertion Vulnerability

SECUNIA ADVISORY ID:
SA13877

VERIFY ADVISORY:
http://secunia.com/advisories/13877/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
ExBB 1.x
http://secunia.com/product/4537/

DESCRIPTION:
Algol has reported a vulnerability in ExBB, which potentially can be
exploited by malicious people to conduct script insertion attacks.

Input passed in some nested BBcode in a forum post is not properly
sanitised before being used. This may be exploited to inject some
script code, which will be executed in a user's browser session in
context of an affected site when the malicious forum entry is
viewed.

The vulnerability has been reported in version 1.9.1. Other versions
may also be affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised.

PROVIDED AND/OR DISCOVERED BY:
Algol

ORIGINAL ADVISORY:
http://antichat.ru/txt/IPB/index3.php

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