XSS vulnerability in Scribe CMS

Vulnerability ID: HTB22421
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_scribe_cms_1.html
Product: Scribe CMS
Vendor: Sigmer Technologies
Vulnerable Version: Current at 03.06.2010 and Probably Prior Versions
Vendor Notification: 07 June 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 "template_admin.php" script to properly sanitize user-supplied input in "orig_t_id" 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:

https://host/path/template_admin.php?action=t_edit&orig_t_id=./%3Cscript%3Ealert%28document.cookie%29%3C/script%3E&path=SITENAME