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Critical · 9.8 Public exploit CVE-2026-87796 EUVD-2026-81335GHSA-h7vp-g8q2-89c8

Multi Uploader for Gravity Forms <= 1.1.9 - Unauthenticated Arbitrary File Upload via Chunked File Upload

Published Sep 17, 2026 · Updated Sep 19, 2026 · Assigned by Wordfence

Vendor: sh1zen Product: Multi Uploader for Gravity Forms Category: Web / CMS

Description

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

VendorProductAffectedFixed
sh1zen Multi Uploader for Gravity Forms ≤ 1.1.9 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

  • abraxas/CVE-2026-87796 ★ 0 · Sep 17, 2026

    CVE-2026-87796 - Multi Uploader for Gravity Forms <= 1.1.9; Unauthorized RCE (CRITICAL 9.8)

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

References