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Date: 11 Jul 2006 19:13:16 -0000
From: omnipresent@...il.it
To: bugtraq@...urityfocus.com
Subject: Fantastic Guestbook v2.0.1 Advisory
.:. Fantastic Guestbook v2.0.1 Advisory .:.
Date of written Advisory:
-------------------------
July, 11 2006
Product:
--------
Fantastic Guestbook v2.0.1
Vendor:
-------
http://fscripts.com/
Description:
------------
Fantastic GuestBook version 2.0.1 is simple GuestBook; where remote user without authentication can post their own message.
No authentication is required! Every body can post message.
Exploit(s) / Vulnerability(ies):
--------------------------------
Fantastic GuestBook version 2.0.1 is affected by a Remote XSS Vulnerability.
Some variables are not properly sanitized before being used.
Here you will find the variables not properly sanitized:
[...]
'first_name'=>$_POST['first_name'],
'last_name'=>$_POST['last_name'],
'nickname'=>$_POST['nickname'],
[...]
PoC(s):
-------
If a malicious people go into the sign in form and put in the fields First Name, Last Name and Nick Name a code like this:
<script>alert("XSS")</script>
When you load the page http://127.0.0.1/[path]/guestbook.php or you read the messages of the guestbook you will se a pop-up that "say" 'XSS'.
Vendor Status:
--------------
July, 2006/11 - Not Informed!
Solution:
---------
At the moment (July, 2006/11) there are no solutions from the vendor. If you want to make sure the code and your GuestBook you have to sanitize the variables:
firs_name
last_name
nick_name
Credits:
--------
omnipresent
omnipresent[at]email[dot]it
http://it.security.netsons.org
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