The Poll Maker – Best WordPress Poll Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting due to a missing capability check on the ays_poll_maker_quick_start AJAX action in addition to insufficient escaping and sanitization in all versions up to, and including, 5.1.8. This makes it possible for unauthenticated attackers to create quizzes and inject malicious web scripts into them that execute when a user visits the page.