Ninja Forms <= 3.6.25 - Denial of Service via Large Form Submissions

Uncontrolled Resource Consumption ('Resource Exhaustion')
CVE CVE-2023-35909
CVSS 5.3 (Medium)
Publicly Published July 7, 2023
Last Updated January 22, 2024
Researcher PetiteMais


The Ninja Forms plugin for WordPress is vulnerable to denial of service in versions up to, and including, 3.6.25. This is due to insufficient controls on form submissions. This makes it possible for unauthenticated attackers to craft form submissions with excessive extra data that may exceed the capacity of the database and prevent further requests from being successful while the submission is processing.



Vulnerability Details for Ninja Forms – The Contact Form Builder That Grows With You

Software Type Plugin
Software Slug ninja-forms (view on
Patched? Yes
Remediation Update to version 3.6.26, or a newer patched version
Affected Version
  • <= 3.6.25
Patched Version
  • 3.6.26

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