From: Secunia Security Advisories (sec-advsecunia.com)
Date: Mon Dec 26 2005 - 06:47:05 CST

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TITLE:
SimpBook "message" Script Insertion Vulnerability

SECUNIA ADVISORY ID:
SA18256

VERIFY ADVISORY:
http://secunia.com/advisories/18256/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting

WHERE:
From remote

SOFTWARE:
SimpBook 1.x
http://secunia.com/product/6668/

DESCRIPTION:
0o_zeus_o0 has discovered a vulnerability in SimpBook, which can be
exploited by malicious people to conduct script insertion attacks.

Input passed to the "message" field isn't sanitised before being
stored in the guestbook. This can be exploited to execute arbitrary
script code in a user's browser session in context of an affected
website when a malicious guestbook entry is viewed.

Successful exploitation requires that "html_enable" is set to "on" in
"config.php". This is set to "on" in the default installation.

The vulnerability has been confirmed in version 1.0. Other versions
may also be affected.

SOLUTION:
Set "html_enable" to "off" in "config.php" or edit the source code to
ensure that input is properly sanitised.

PROVIDED AND/OR DISCOVERED BY:
0o_zeus_o0

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