CVE-2026-87796: SH1ZEN Multi Uploader For Gravity Forms

Critical severity, CVSS 9.8. EPSS: 1.1% chance of exploitation in the next 30 days.

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 move_file 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 products

• SH1ZEN Multi Uploader For Gravity Forms: up to and including 1.1.9

Published 2026-09-17. Last modified 2026-09-19.