Input validation vulnerability in Side Cart Woocommerce (Ajax) 2.2

The Side Cart Woocommerce (Ajax) plugin for WordPress contains a security flaw which can be exploited by attackers with administrator-level permissions. This vulnerability allows them to inject malicious code into web pages, so that it will be executed automatically whenever a user accesses that page. This only applies to WordPress multi-site installations and installations where the ‘unfiltered_html’ setting has been disabled. The vulnerability exists in all versions up to and including 2.2 of this plugin, due to a lack of input sanitization and output escaping.