Brief.
We have updated files:
block_merchant_contact.php
block_forum_breadcrumb.php
block_products_breadcrumb.php
block_articles_details.
after release 3.3.2 has been issued.
Description.
There were some cross-site scripting vulnerabilities.
Solution.
We recommend to download an updated version of the files from here:
http://www.viart.com/downloads/blocks_xss_fix-3.3.2.zip
Then extract the above mentioned files into the 'blocks' folder of your shop replacing existing ones. Don't forget to make a backup copy of the current file in case something goes wrong.