Ninja Forms – The Contact Form Builder That Grows With You <= 3.15.3 - Stored Cross-Site Scripting

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-94504
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-22 07:16:31 UTC
Updated2026-09-22 19:04:55 UTC
DescriptionNinja Forms 3.15.3 stores an anonymous non-RTE textarea value and renders it without safe HTML encoding in the legacy submission editor. An attacker can break out of the textarea with stored script. When an Administrator opens the attacker-known direct submission URL, the script runs in the WordPress admin 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

EPSS: 0.002920000 probability, percentile 0.220520000 (date 2026-09-22)

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Kstover Ninja Forms Contact Form Builder With Calculators Quizzes Signatures AI Form Builder affected 3.15.3 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.3/includes/Templates/admin-meta... [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/3.15.3/includes/Fields/Textarea.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ninja-forms/trunk/includes/Fields/Textarea.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/c599a562-5218-4b37-bcf7-0e820... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/ninja-forms/tags/3.15.3/includes/Database/Models/Subm... [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: Hippolyte Quéré (Hippie) (Hippie) (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-09-11T20:28:47.000ZVendor Notified
CNA2026-09-21T18:15:56.000ZDisclosed

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