Ninja Forms <= 3.6.25 - Authenticated (Administrator+) Stored HTML Injection

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2023-4109
CVSS 4.4 (Medium)
Publicly Published August 7, 2023
Last Updated May 31, 2024
Researcher Sayandeep Dutta


The Ninja Forms plugin for WordPress is vulnerable to Stored HTML Injection in versions up to, and including, 3.6.25 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers with administrator access to inject arbitrary HTML content in pages that will execute whenever a user accesses an injected page.



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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