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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2026-0184
Arbitrary File Upload Vulnerability in Ninja Forms - File Uploads plugin for WordPress

Original Issue Date:April 15, 2026

Severity Rating: CRITICAL

Software Affected

  • Ninja Forms - File Uploads plugin for WordPress prior to 3.3.27

Overview

A critical vulnerability has been identified in the Ninja Forms ¿ File Uploads plugin for WordPress. The flaw allows unauthenticated attackers to upload arbitrary files, potentially leading to remote code execution on the affected server.

Target Audience:
Website administrators, developers, and organizations using WordPress with the Ninja Forms - File Uploads plugin installed.

Risk Assessment:
Critical risk due to the possibility of unauthenticated remote code execution.

Impact Assessment:
Remote code execution, unauthorized access, and data manipulation.

Description

Ninja Forms is a widely used WordPress plugin for creating forms, with an extension for handling file uploads.

The vulnerability (CVE-2026-0740) exists due to missing file type validation in the function:NF_FU_AJAX_Controllers_Uploads::handle_upload.

This flaw affects all versions up to and including 3.3.26. Due to insufficient validation of uploaded files, an unauthenticated attacker can upload arbitrary files (including executable scripts) to the server.

Solution

Apply appropriate security updates as mentioned in ninja-forms-uploads Security Updates:
https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/ninja-forms-uploads/ninja-forms-file-upload-3326-unauthenticated-arbitrary-file-upload

Vendor Information

 
https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/ninja-forms-uploads/ninja-forms-file-upload-3326-unauthenticated-arbitrary-file-upload

References

 
https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/ninja-forms-uploads/ninja-forms-file-upload-3326-unauthenticated-arbitrary-file-upload

CVE Name
CVE-2026-0740

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-22902657

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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