XSS vulnerability in Atutor edit content folder

Vulnerability ID: HTB22599
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_atutor_edit_content_folder.html
Product: ATutor
Vendor: Inclusive Design Institute ( http://www.atutor.ca/ )
Vulnerable Version: 1.0
Vendor Notification: 01 September 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 "/mods/_core/editor/edit_content_folder.php" script to properly sanitize user-supplied input in "cid" 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:
http://host/mods/_core/editor/edit_content_folder.php?cid=PAGE_ID"><script>alert(document.cookie)</script>