Description
The Ninja Forms WordPress plugin 3.15.3 does not prevent user-submitted form field values from being deserialised when an administrator later exports form submissions to CSV, allowing unauthenticated attackers to perform PHP Object Injection; if a suitable POP chain is present via another installed plugin or theme, this can lead to actions such as arbitrary file operations or remote code execution.
Published: 2026-09-22
Score: 7.5 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 22 Sep 2026 11:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 22 Sep 2026 08:45:00 +0000

Type Values Removed Values Added
First Time appeared Ninjaforms
Ninjaforms ninja Forms
Wordpress
Wordpress wordpress
Weaknesses CWE-502
Vendors & Products Ninjaforms
Ninjaforms ninja Forms
Wordpress
Wordpress wordpress

Tue, 22 Sep 2026 07:15:00 +0000

Type Values Removed Values Added
Description The Ninja Forms WordPress plugin 3.15.3 does not prevent user-submitted form field values from being deserialised when an administrator later exports form submissions to CSV, allowing unauthenticated attackers to perform PHP Object Injection; if a suitable POP chain is present via another installed plugin or theme, this can lead to actions such as arbitrary file operations or remote code execution.
Title Ninja Forms 3.15.3 - Unauthenticated PHP Object Injection via CSV Export
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}


Subscriptions

Ninjaforms Ninja Forms
Wordpress Wordpress
cve-icon MITRE

Status: PUBLISHED

Assigner: WPScan

Published:

Updated: 2026-09-22T10:05:56.864Z

Reserved: 2026-09-15T08:07:50.100Z

Link: CVE-2026-91827

cve-icon Vulnrichment

Updated: 2026-09-22T10:05:43.776Z

cve-icon NVD

Status : Received

Published: 2026-09-22T07:16:31.093

Modified: 2026-09-22T11:17:26.140

Link: CVE-2026-91827

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-22T08:30:17Z

Weaknesses