What the vulnerability does
01Description
The Ninja Forms - File Uploads plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'NF_FU_AJAX_Controllers_Uploads::handle_upload' function in all versions up to, and including, 3.3.26. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible. Note: The vulnerability was partially patched in version 3.3.25 and fully patched in version 3.3.27.
Explanation of Vulnerability in Simple Terms
02Summary
Ninja Forms File Uploads allows unauthenticated attackers to upload files without restriction, potentially enabling them to run malicious code on the site. The vulnerability affects all versions up to 3.3.26. No authentication or user interaction is required to exploit this flaw. Site administrators should update immediately to a patched version.
What an attacker can do
03Attacker Capabilities
Upload and execute arbitrary files on the site without authentication.
Potential impact on your site
04Site Impact
Attackers can run malicious code, steal data, or take full control of your site.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
April 7, 2026
CVE published
April 8, 2026
Record updated
