Brief
Some admin scripts after successful authorization potentially can be used for cross-site scripting.
 
Solution
To eliminate any risks however small please download the files below:
http://www.viart.com/downloads/admin_config-4.2.zip
http://www.viart.com/downloads/url.zip
 
Further, extract the 'admin_config.php' in the 'admin' and 'url.php' in the 'includes' folders replacing existing files. Please do not forget to make a backup copy of the current files in case something goes wrong.