High-privileged user (Editor+) can exploit XSS via Add New Form's form parameters:
- Button text
- Field Description
The stored script is executed for all the users visiting the website.
## Proof of Concept
1. Download and install "Constant Contact Forms for WordPress 1.8.7" from https://wordpress.org/plugins/constant-contact-forms/
2. Go into "Contact Form" tab from the sidebar and create a new form by clicking on the "Add New Form" button.
3. Input an XSS vector to "Button text", "Field Description" fields, for example:
" autofocus=true onfocus='alert(document.domain)'>
4. Save the changes and click on "Publish" (Editor role).