NotificationX <= 3.3.3 - Missing Authorization to Unauthenticated Arbitrary Content Injection via 'nx_id' Parameter on /popup-submit REST Route
Summary
| CVE | CVE-2026-110721 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-16 05:17:30 UTC |
| Updated | 2026-10-16 05:17:30 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 5.3 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 5.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| 3.1 | CNA | DECLARED | 5.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Wpdevteam | NotificationX FOMO Live Sales Notification WooCommerce Sales Popup GDPR Social Proof Announcement Banner Floating Notification Bar | affected 3.3.3 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/browser/notificationx/tags/3.3.3/includes/Admin/Entries.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/notificationx/tags/3.3.3/includes/Extensions/PopupNot... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/notificationx/tags/3.3.3/includes/Core/Rest/Popup.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/notificationx/tags/3.3.3/includes/Extensions/Extensio... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/notificationx/tags/3.3.3/includes/Core/Rest/Popup.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/changeset/3746251/notificationx/trunk/includes/Extensions/Pop... | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/84b5e044-4522-480a-ad14-8886e... | [email protected] | www.wordfence.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Eunho Kim (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-10-14T15:00:30.000Z | Vendor Notified |
| CNA | 2026-10-15T16:22:58.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.