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CVE-2026-87796— Multi Uploader for Gravity Forms <= 1.1.9 - Unauthenticated Arbitrary File Upload via Chunked File Upload

Quick assessment

Affected
sh1zen Multi Uploader for Gravity Forms
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 的“Multi Uploader for Gravity Forms”插件在所有版本（包括 1.1.9 及更早版本）中均存在任意文件上传漏洞，漏洞源于 函数。该漏洞是由于在处理分块上传（chunked upload）过程中，对文件类型验证不足所致。这使得未认证的攻击者能够上传任意文件到受影响网站的服务器上，进而可能导致远程代码执行（RCE）。

CVSS 9.8 · Critical
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I. Basic Information for CVE-2026-87796

Vulnerability Information
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Vulnerability Title
Multi Uploader for Gravity Forms <= 1.1.9 - Unauthenticated Arbitrary File Upload via Chunked File Upload
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
sh1zen Multi Uploader for Gravity Forms 0 ~ 1.1.9 -

II. Public POCs for CVE-2026-87796

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III. Intelligence Information for CVE-2026-87796

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Vendor Advisories for CVE-2026-87796 (1)

Other References for CVE-2026-87796 (4)

IV. Related Vulnerabilities

Same product: Multi Uploader for Gravity Forms
Same vendor: sh1zen
Same weakness: CWE-434

V. Comments for CVE-2026-87796

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