TITLE:
Gästebuch Homepage URL Script Insertion Vulnerability

SECUNIA ADVISORY ID:
SA18849

VERIFY ADVISORY:
http://secunia.com/advisories/18849/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
php4scripte.de Gästebuch 1.x
http://secunia.com/product/8067/

DESCRIPTION:
Micha Borrmann has reported a vulnerability in Gästebuch (gastbuch),
which can be exploited by malicious people to conduct script
insertion attacks.

Input passed to the Homepage 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.

The vulnerability has been reported in version 1.3.2. Prior versions
may also be affected.

SOLUTION:
Update to version 1.3.3.
http://www.php4scripte.de/gast.php

PROVIDED AND/OR DISCOVERED BY:
Micha Borrmann

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