osCommerce 2.1/2.2 - 'Checkout_Payment.php' Error Output Cross-Site Scripting

Author: iProyectos group
type: webapps
platform: php
port: 
date_added: 2003-03-20 
date_updated: 2012-11-01 
verified: 1 
codes: OSVDB-7376 
tags: 
aliases:  
screenshot_url:  
application_url: 

source: https://www.securityfocus.com/bid/7155/info

Error output is not sufficiently sanitized of HTML and script code by osCommerce. This may allow for cross-site scripting attacks as remote users could create a malicious link to a site hosting osCommerce which contains hostile HTML and script code. When a such a link is visited, attacker-supplied code could be interpreted in the web client of the user.

http://www.example.com/checkout_payment.php?payment_error=cc&error=%3Cscript%20language=javascript%3Ewindow.alert%28document.cookie%29;%3C/script%3E

Please note that the 'cc' value for 'payment_error' must be substituted with the name of a valid payment module.