CVE-2026-19769Ninja Forms <= 3.15.1 - Unauthenticated Stored Cross-Site Scripting via Repeater Child 'type' Confusion via Unmatched Array Key
Updated under an hour ago ()
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It affects kstover Ninja Forms – The Contact Form Builder That Grows With You. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Wordfence
- NVD analysis
- Deferred
- Record last updated
- Sep 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
kstover Ninja Forms – The Contact Form Builder That Grows With You kstover:ninja_forms_the_contact_form_builder_that_grows_with_you (from the name) | through 3.15.1 | CNA record |
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/2330e381-7db3-4b79-8827-818d2ea954b5?source=cve
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L609
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L303
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L55
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L61
- https://plugins.trac.wordpress.org/changeset?reponame=&new=3674413%40ninja-forms%2Ftags%2F3.15.2&old=3663678%40ninja-forms%2Ftags%2F3.15.1
- https://plugins.trac.wordpress.org/changeset/3674413/ninja-forms/trunk/includes/AJAX/Controllers/Submission.php
- https://plugins.trac.wordpress.org/changeset?old_path=%2Fninja-forms/tags/3.15.1&new_path=%2Fninja-forms/tags/3.15.2
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.