1. Create/edit a Form via the plugin.
2. Put the following payload: 1" onmouseover="alert(/XSS/)// in the field named 'Step Title', 'Step Headline', 'Step description', and 'Sections'. Fill in other information and save.
The XSS will be triggered when editing the form and moving the mouse on the affected field, as well as in a page/post where the form is embedded and the mouse is moved over the text below the green flag.