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XSS vulnerability in Lantern CMS



Vulnerability ID: HTB22621
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_lantern_cms_1.html
Product: Lantern CMS
Vendor: Lantern ( http://www.lanterncms.com/www/html/7-home-page.asp ) 
Vulnerable Version: Current at 18.09.2010 and Probably Prior Versions
Vendor Notification: 22 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 login script to properly sanitize user-supplied input in "intPassedLocationID" 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/www/html/11-login.asp?intPassedLocationID=57%27%22%3E%3Cscript%3Ealert%2834%29%3C/script%3E