CVE-2026-90438
Ninja Forms <= 3.15.4 - Unauthenticated Stored Cross-Site Scripting via Paragraph Text (RTE) Field Submission
- State
- Published
- Severity
- 7.2 High
- Published
- Oct 2, 2026
- Updated
- Oct 3, 2026
- Reserved
- Sep 11, 2026
Description
The Ninja Forms – The Contact Form Builder That Grows With You plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Paragraph Text (RTE) Field Submission in all versions up to, and including, 3.15.4 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. This is only exploitable when the targeted Paragraph Text field has the Rich Text Editor (RTE) option enabled.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.2 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N | Wordfence |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builderkstover |
|
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/a159485d-ce5b-46e7-8e63-a72012ccc180?source=cve
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.3/build/submissions.js#L1
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.3/includes/Helper.php#L261
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.3/includes/Database/Models/Submission.php#L308
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.3/includes/AJAX/Controllers/Submission.php#L61
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.2/build/submissions.js#L1
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.2/includes/Helper.php#L261
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.2/includes/Database/Models/Submission.php#L308
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.2/includes/AJAX/Controllers/Submission.php#L61
- https://plugins.trac.wordpress.org/changeset?reponame=&new=3717122%40ninja-forms%2Ftags%2F3.15.5&old=3705719%40ninja-forms%2Ftags%2F3.15.4
- https://plugins.trac.wordpress.org/changeset/3717122/ninja-forms/trunk/includes/AJAX/Controllers/Submission.php
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