wpdevteam NotificationX Plugin up to 3.3.3 on WordPress Popup Submission popup-submit handle_popup_submission nx_id authorization

Summaryinfo

A vulnerability was found in wpdevteam NotificationX Plugin up to 3.3.3. It has been declared as problematic. The impacted element is the function PopupNotification::handle_popup_submission of the file /notificationx/v1/popup-submit of the component Popup Submission Handler. The manipulation of the argument nx_id results in authorization. This vulnerability was named CVE-2026-110721. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in wpdevteam NotificationX Plugin up to 3.3.3. It has been classified as problematic. Affected is the function PopupNotification::handle_popup_submission of the file /notificationx/v1/popup-submit of the component Popup Submission Handler. The manipulation of the argument nx_id with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on integrity. CVE summarizes:

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.

The advisory is available at wordfence.com. This vulnerability is traded as CVE-2026-110721 since 10/14/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/16/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• WordPress Plugin

Vendor

• wpdevteam

Name

• NotificationX Plugin

Version

• 3.3.0
• 3.3.1
• 3.3.2
• 3.3.3

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

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• 🔒
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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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