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TITLE:
SimpleBoard "sb_authorname" Script Insertion Vulnerability

SECUNIA ADVISORY ID:
SA20409

VERIFY ADVISORY:
http://secunia.com/advisories/20409/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
SimpleBoard 1.x (component for Mambo)
http://secunia.com/product/10318/

DESCRIPTION:
Yannick von Arx has discovered a vulnerability in SimpleBoard, which
can be exploited by malicious people to conduct script insertion
attacks.

Input passed to the "sb_authorname" parameter when submitting a new
forum post is not properly sanitised before being displayed in the
"Last Post" column. This can be exploited to insert arbitrary HTML
and script code, which will be executed in a user's browser session
in context of an affected site when the main page of the Forum is
viewed.

The vulnerability has been confirmed in version 1.1.0 Stable when
used with Joomla 1.0.8. Other versions may also be affected.

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

PROVIDED AND/OR DISCOVERED BY:
Yannick von Arx

ORIGINAL ADVISORY:
http://lists.grok.org.uk/pipermail/full-disclosure/2006-June/046484.html

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