What the vulnerability does
01Description
The WP Dropzone plugin for WordPress is vulnerable to authenticated arbitrary file upload in all versions up to, and including, 1.1.0 via the `ajax_upload_handle` function. This is due to the chunked upload functionality writing files directly to the uploads directory before any file type validation occurs. This makes it possible for authenticated attackers, with subscriber level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.
Explanation of Vulnerability in Simple Terms
02Summary
WP Dropzone versions 1.1.0 and earlier allow authenticated users to upload files without proper validation. An attacker with low-level site access can upload malicious files, including executable code, to compromise the site. The vulnerability affects file integrity and confidentiality.
What an attacker can do
03Attacker Capabilities
Upload malicious files to the site, potentially including executable code that runs on the server.
Potential impact on your site
04Site Impact
Attackers with basic site access can upload and execute code, leading to full site compromise and data theft.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege user account on the site (e.g., subscriber or contributor role).
Key dates
06Disclosure timeline
November 18, 2025
CVE published
April 8, 2026
Record updated
