The NotificationX plugin for WordPress is vulnerable to Missing Authorization leading to arbitrary content injection in versions up to, and including, 3.3.3 The /notificationx/v1/popup-submit REST route is registered with permissioncallback => 'returntrue', and the handler at PopupNotification::handlepopupsubmission() accepts an attacker-controlled nxid, loads whichever NotificationX campaign that id points to, and copies that campaign's own source into the new entry without verifying that the campaign is a Popup Notification or Exit Intent Popup (the two sources this form is intended to serve). This makes it possible for unauthenticated attackers to inject forged social-proof entries (name, title, message, email, theme) into any enabled non-popup NotificationX campaign — WP Comments, WooCommerce/EDD/Give sales, reviews, etc.

The NotificationX – Live Sales Notification, WooCommerce Sales Popup, FOMO, Social Proof, Announcement Banner & Floating Notification Top Bar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's content settings for notifications in all versions up to, and including, 2.9.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfilteredhtml has been disabled.

The NotificationX – Best FOMO, Social Proof, WooCommerce Sales Popup & Notification Bar Plugin With Elementor plugin for WordPress is vulnerable to SQL Injection via the 'type' parameter in all versions up to, and including, 2.8.2 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.