Description
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 permission_callback => '__return_true', and the handler at PopupNotification::handle_popup_submission() accepts an attacker-controlled nx_id, 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.
References7
- plugins.trac.wordpress.org/browser/notificationx/tags/3.3.3/inc…
- plugins.trac.wordpress.org/browser/notificationx/tags/3.3.3/inc…
- plugins.trac.wordpress.org/browser/notificationx/tags/3.3.3/inc…
- plugins.trac.wordpress.org/browser/notificationx/tags/3.3.3/inc…
- plugins.trac.wordpress.org/browser/notificationx/tags/3.3.3/inc…
- plugins.trac.wordpress.org/changeset/3746251/notificationx/trun…
- www.wordfence.com/threat-intel/vulnerabilities/id/84b5e044-4522…
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - EPSS — exploit probability
- 0% percentile: 16 · as of 10 November 2026
- CWE
- CWE-862
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.