CVE-2026-87796: Multi Uploader for Gravity Forms <= 1.1.9 - Unauthenticated Arbitrary File Upload via Chunked File Upload
The Multi Uploader for Gravity Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.1.9 via the movefile function. This is due to insufficient file type validation during chunked upload handling. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
Affected Software
Event History
Frequently Asked Questions
Which sites are affected?
WordPress sites using the Multi Uploader for Gravity Forms plugin are affected if the installed version is 1.1.9 or earlier.
Does exploitation require an account or user interaction?
No. The vulnerability is exploitable by an unauthenticated attacker and requires no user interaction.
What could an attacker achieve?
An attacker can upload arbitrary files to the affected server through chunked upload handling. This may make remote code execution possible.
How can I determine whether my site is affected?
Check whether the Multi Uploader for Gravity Forms plugin is installed and verify its version. Versions up to and including 1.1.9 are affected.