Ninja Forms <= 3.14.6 - Authenticated (Administrator+) PHP Object Injection via Form Import

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-11363
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-09 04:17:56 UTC
Updated2026-09-09 17:17:12 UTC
DescriptionThe Ninja Forms – The Contact Form Builder That Grows With You plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.14.6 via deserialization of untrusted input . This makes it possible for authenticated attackers, with administrator-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present. The deserialization is triggered automatically during form import when WPN_Helper::build_nf_cache() invokes $action->get_settings() immediately after the crafted form is imported, requiring no further interaction beyond the import action itself.

Risk And Classification

Primary CVSS: v3.1 6.6 MEDIUM from [email protected]

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

EPSS: 0.006790000 probability, percentile 0.502650000 (date 2026-09-09)

Problem Types: CWE-502 | CWE-502 CWE-502 Deserialization of Untrusted Data

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.6MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED6.6MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Kstover Ninja Forms The Contact Form Builder That Grows With You affected 3.14.6 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.2/includes/Admin/Menus/ImportEx... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.2/includes/Abstracts/Model.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.5/includes/Admin/Menus/ImportEx... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.2/includes/Admin/Processes/Impo... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.2/includes/Helper.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.5/includes/Abstracts/Model.php [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/3.14.5/includes/Helper.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.5/includes/Admin/Processes/Impo... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/d95427d0-77c6-41d6-93f1-50899... [email protected] www.wordfence.com
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: Hermione (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-06-05T11:59:16.000ZVendor Notified
CNA2026-09-08T14:33:35.000ZDisclosed

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report