Ninja Forms <= 3.15.1 - Unauthenticated Stored Cross-Site Scripting via Repeater Child 'type' Confusion via Unmatched Array Key
Summary
| CVE | CVE-2026-19769 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-05 07:17:11 UTC |
| Updated | 2026-09-05 07:17:11 UTC |
| Description | The Ninja Forms – The Contact Form Builder That Grows With You plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Repeater Child 'type' Confusion via Unmatched Array Key in all versions up to, and including, 3.15.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the Ninja Forms File Uploads add-on to be active, as the attack routes the unwhitelisted child entry through the File Uploads handler to write an attacker-supplied HTML file containing arbitrary JavaScript into any web-server-writable directory, including the site root, where it is served from the site's own origin. |
Risk And Classification
Primary CVSS: v3.1 7.2 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 7.2 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
| 3.1 | CNA | DECLARED | 7.2 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
ChangedConfidentiality
LowIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Kstover | Ninja Forms The Contact Form Builder That Grows With You | affected 3.15.1 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/changeset/3674413/ninja-forms/trunk/includes/AJAX/Controllers... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Su... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/changeset | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Su... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Su... | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/2330e381-7db3-4b79-8827-818d2... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/changeset | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Su... | [email protected] | plugins.trac.wordpress.org | |
| 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: Jonah Burgess (CryptoCat) (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-08-13T17:27:55.000Z | Vendor Notified |
| CNA | 2026-09-04T17:43:32.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.