Vulnerability · Published Jul 21, 2026 · Assigned by VulnCheck
CVE-2026-65051Ninja Forms Server-Side Validation Bypass via Client-Controlled Field Metadata Merge in AJAX Submission Handler
Medium 6.5
In plain English
A medium-severity security flaw in Ninja Forms from Saturday Drive. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Saturday Drive | Ninja Forms | 0 – before 3.14.9 |
Weakness: CWE-602 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L