CVE-2026-67187

HIGH 7.1

Ninja Forms WordPress Plugin < 3.15.4 Server-Side Validation Bypass via List Fields

CVSS Score

7.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-1236
Vendor	saturday drive
Product	ninja forms
Published	Oct 28, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Affected Versions

Saturday Drive / Ninja Forms

0 < 3.15.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

wordpress.org: https://wordpress.org/plugins/ninja-forms/#developers vulncheck.com: https://www.vulncheck.com/advisories/ninja-forms-wordpress-plugin-server-side-validation-bypass-via-list-fields

Credits

Choriyev Qahramon (ciprobe)