Description
Ninja Forms plugin for WordPress before 3.15.4 contains an incomplete server-side validation vulnerability that allows unauthenticated attackers to submit arbitrary values to Checkbox List, Multi-Select List, Image List, Country, and State fields because NF_Abstracts_List falls through to a validate() method that only checks required-field presence. Attackers can submit crafted formula payloads through the unauthenticated nf_ajax_submit endpoint that bypass CSV escaping applied only to Textbox and Textarea fields, resulting in CSV injection when an administrator downloads and opens the exported submissions file.
Published: 2026-10-28
Score: 5.1 Medium
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

Wed, 28 Oct 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Saturday Drive
Saturday Drive ninja Forms
Wordpress-extensions
Wordpress-extensions ninja Forms
Vendors & Products Saturday Drive
Saturday Drive ninja Forms
Wordpress-extensions
Wordpress-extensions ninja Forms

Wed, 28 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Description Ninja Forms plugin for WordPress before 3.15.4 contains an incomplete server-side validation vulnerability that allows unauthenticated attackers to submit arbitrary values to Checkbox List, Multi-Select List, Image List, Country, and State fields because NF_Abstracts_List falls through to a validate() method that only checks required-field presence. Attackers can submit crafted formula payloads through the unauthenticated nf_ajax_submit endpoint that bypass CSV escaping applied only to Textbox and Textarea fields, resulting in CSV injection when an administrator downloads and opens the exported submissions file.
Title Ninja Forms WordPress Plugin < 3.15.4 Server-Side Validation Bypass via List Fields
Weaknesses CWE-1236
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L'}


Subscriptions

Saturday Drive Ninja Forms
Wordpress-extensions Ninja Forms
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-28T15:19:16.649Z

Reserved: 2026-07-28T16:06:49.773Z

Link: CVE-2026-67187

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-28T16:17:08.767

Modified: 2026-10-28T16:17:08.767

Link: CVE-2026-67187

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-28T16:30:15Z

Weaknesses