The Popup Box WordPress plugin before 5.5.0 does not properly validate nonces in the addoreditpopupbox() function before saving popup data, allowing unauthenticated attackers to perform Cross-Site Request Forgery attacks. When an authenticated admin visits a malicious page, the attacker can create or modify popups with arbitrary JavaScript that executes in the admin panel and frontend.
Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in Popup Box Team Popup box plugin <= 3.4.4 versions.