The XPlainer – WooCommerce Product FAQ [WooCommerce Accordion FAQ Plugin] plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'ffw_activate_template' function in all versions up to, and including, 1.6.4. This makes it possible for authenticated attackers, with Subscriber-level access and above, to store cross-site scripting that will trigger when viewing the dashboard templates or accessing FAQs.