High severity · published Oct 2, 2026
CVE-2026-90438
Ninja Forms <= 3.15.4 - Unauthenticated Stored Cross-Site Scripting via Paragraph Text (RTE) Field Submission
7.2
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NF
Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder · kstover
through 3.15.4 · source: vendor
Affected product
NF
Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder
kstover
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90438
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-90438
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/a159485d-ce5b-46e7-8e63-a72012ccc180?source=cve
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.3/build/submissions.js#L1
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.3/includes/Helper.php#L261
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.3/includes/Database/Models/Submission.php#L308
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.3/includes/AJAX/Controllers/Submission.php#L61
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.2/build/submissions.js#L1
More from Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder
7.2
CVE-2026-94504
Ninja Forms – The Contact Form Builder That Grows With You <= 3.15.3 - Stored Cross-Site Scripting