CVE-2026-19769 json
Ninja Forms <= 3.15.1 - Unauthenticated Stored Cross-Site Scripting via Repeater Child 'type' Confusion via Unmatched Array Key
published 2026-09-05 2 mo ago modified 2026-09-08 2 mo ago also EUVD-2026-71880
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 37%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- kstover Ninja Forms – The Contact Form Builder That Grows With You
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/2330e381-7db3-4b79-8827-818d2ea954b5?source=cve
- plugins.trac.wordpress.org /browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L609
- plugins.trac.wordpress.org /browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L303
- plugins.trac.wordpress.org /browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L55
- plugins.trac.wordpress.org /browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L61
- plugins.trac.wordpress.org /changeset?reponame=&new=3674413%40ninja-forms%2Ftags%2F3.15.2&old=3663678%40ninja-forms%2Ftags%2F3.15.1
- plugins.trac.wordpress.org /changeset/3674413/ninja-forms/trunk/includes/AJAX/Controllers/Submission.php
- plugins.trac.wordpress.org /changeset?old_path=%2Fninja-forms/tags/3.15.1&new_path=%2Fninja-forms/tags/3.15.2
Sources
- CVE List CVE-2026-19769
- NVD CVE-2026-19769
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.