Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Daniel Iser Popup Maker popup-maker allows Stored XSS.This issue affects Popup Maker: from n/a through <= 1.20.2.
The Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popups Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘post_title’ parameter in all versions up to, and including, 1.20.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.