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CVE-2026-0740 PoC — Ninja Forms - File Upload <= 3.3.26 - Unauthenticated Arbitrary File Upload

Source
https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-0740.yaml
Associated Vulnerability
Title:Ninja Forms - File Upload <= 3.3.26 - Unauthenticated Arbitrary File Upload (CVE-2026-0740)
Description: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.
Description
Ninja Forms File Uploads plugin for WordPress versions up to and including 3.3.26 is vulnerable to unauthenticated arbitrary file upload which could lead to remote code execution.
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