Sylius is an open source eCommerce platform. Prior to 1.12.16 and 1.13.1, there is a possibility to execute javascript code in the Admin panel. In order to perform an XSS attack input a script into Name field in which of the resources: Taxons, Products, Product Options or Product Variants. The code will be executed while using an autocomplete field with one of the listed entities in the Admin Panel. Also for the taxons in the category tree on the product form.The issue is fixed in versions: 1.12.16, 1.13.1.