The Ultimate FAQ WordPress plugin before 2.1.2 does not have capability and CSRF checks in the ewdufaqwelcomeaddfaq and ewdufaqwelcomeaddfaqpage AJAX actions, available to any authenticated users. As a result, any users, with a role as low as Subscriber could create FAQ and FAQ questions
The ultimate-faqs plugin before 1.8.22 for WordPress has XSS.