Grid/List View for WooCommerce <= 3.0.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'position' Shortcode Attribute

The Grid/List View for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'position' Shortcode Attribute in all versions up to, and including, 3.0.9 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The shortcode's all_page="1" attribute can be used to force the widget to render on any page, expanding the attack surface beyond shop and category pages.