CVE-2026-87796 Multi Uploader for Gravity Forms - Unrestricted File Upload

Multi Uploader for Gravity Forms WordPress plugin <= 1.1.9 contains an arbitrary file upload vulnerability caused by insufficient file type validation in move_file function during chunked upload handling, letting unauthenticated attackers upload arbitrary files, exploit requires no authentication.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
Proof of concept available
Authentication
Not required
EPSS
1.14% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Unrestricted File Upload
Impact
Remote Code Execution, File System Write
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026
Weakness
CWE-434

Vendor fix

Update to the latest version beyond 1.1.9.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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