What is CVE-2026-87796?

CVE-2026-87796 is a critical-severity vulnerability in Sh1zen Multi Uploader For Gravity Forms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2026-09-17.

How severe is CVE-2026-87796?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Arbitrary file upload in Sh1zen Multi Uploader For Gravity Forms

CVE-2026-87796

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.

Vulnerability class: Unrestricted File Upload

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Sh1zen Multi Uploader For Gravity Forms

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

Frequently asked questions

What is CVE-2026-87796?: CVE-2026-87796 is a critical-severity vulnerability in Sh1zen Multi Uploader For Gravity Forms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2026-09-17.
How severe is CVE-2026-87796?: Critical severity. CVSS v3 base score is 9.8 out of 10.