TITLE:
Phpclanwebsite "img" BBcode Script Insertion Vulnerability

SECUNIA ADVISORY ID:
SA18541

VERIFY ADVISORY:
http://secunia.com/advisories/18541/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
Phpclanwebsite 1.x
http://secunia.com/product/6884/

DESCRIPTION:
Night_Warrior has discovered a vulnerability in Phpclanwebsite, which
can be exploited by malicious people to conduct script insertion
attacks.

Input passed to the "img" BBcode tag when posting a message isn't
properly sanitised and verified before being used. This can be
exploited to inject arbitrary script code, which will be executed in
a user's browser session in context of an affected site when the
malicious message is viewed with the Microsoft Internet Explorer
browser.

Example:
[img]javascript:[code][/img]

The vulnerability has been confirmed in version 1.23.1. Other
versions may also be affected.

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

PROVIDED AND/OR DISCOVERED BY:
Night_Warrior

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