[UNIX] Advanced Guestbook XSS

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To: list@securiteam.com
Date: 29 Dec 2004 14:23:23 +0200

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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  Advanced Guestbook XSS
------------------------------------------------------------------------

SUMMARY

 <http://proxy2.de/scripts.php> Advanced Guestbook is "a PHP-based
guestbook script. It includes many useful features such as preview,
templates, e-mail notification, picture upload, page spanning , html tags
handling, smilies, advanced guestbook codes and language support".

By triggering an SQL error it is possible to cause Advanced Guestbook to
display arbitrary HTML and/or JavaScript.

DETAILS

Vulnerable Systems:
 * Advanced Guestbook 2.3.1 and prior

Exploit:
index.php?entry=<script>alert(document.cookie)</script>

ADDITIONAL INFORMATION

The information has been provided by <mailto:emile.van.elen@gmail.com>
Emile van Elen.

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