Frontend File Manager <= 18.2 - Unauthenticated Arbitrary File Download

Missing Authorization
CVE CVE-2021-4356
CVSS 9.0 (Critical)
Publicly Published July 12, 2021
Last Updated June 7, 2023
Researcher Jerome Bruandet - NinTechNet


The Frontend File Manager plugin for WordPress is vulnerable to Unauthenticated Arbitrary File Download in versions up to, and including, 18.2. This is due to lacking authentication protections, capability checks, and sanitization, all on the wpfm_file_meta_update AJAX action. This makes it possible for unauthenticated attackers to download arbitrary files on the site, potentially leading to site takeover.



Vulnerability Details for Frontend File Manager Plugin

Software Type Plugin
Software Slug nmedia-user-file-uploader (view on
Patched? Yes
Remediation Update to version 18.3, or a newer patched version
Affected Version
  • < 18.3
Patched Version
  • 18.3

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