Ninja Forms: CSV injection via server-side validation bypass (CVE-2026-67187)
An incomplete server-side validation vulnerability in Ninja Forms for WordPress before 3.15.4 allows unauthenticated attackers to perform CSV injection attacks.
CVE search metadata
CVE search record: CVE-2026-67187. Severity: high. CVSS: 7.1. KEV: no. Product: Ninja Forms (< 3.15.4). Brief: Ninja Forms: CSV injection via server-side validation bypass (CVE-2026-67187). Brief link: https://feed.craftedsignal.io/briefs/2026-10-ninja-forms-cve-2026-67187/
Triage facts
Revision 1- Applicability
- Ninja Forms (< 3.15.4)
- Evidence
- Unknown
- Severity
- High
- Sources
- 1 public source
- Freshness
- Revision 1Oct 28, 16:34 UTC
- Vulnerabilities
- 1 CVE
- Source quality
- A2Roughly even chance
The Ninja Forms plugin for WordPress before version 3.15.4 contains an incomplete server-side validation vulnerability. The NF_Abstracts_List class performs a validate() method that only checks for required-field presence. Unauthenticated attackers can submit crafted formula payloads to Checkbox List, Multi-Select List, Image List, Country, and State fields via the nf_ajax_submit endpoint. Because CSV escaping is only applied to Textbox and Textarea fields, these payloads result in CSV injection when an administrator downloads and opens the exported submissions file.