Frontend File Manager <= 18.2 - Authenticated Settings Change leading to Arbitrary File Upload

Missing Authorization
CVE CVE-2021-4368
CVSS 9.9 (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 Authenticated Settings Change in versions up to, and including, 18.2. This is due to lacking capability checks and a security nonce, all on the wpfm_save_settings AJAX action. This makes it possible for subscriber-level attackers to edit the plugin settings, such as the allowed upload file types. This can lead to remote code execution through other vulnerabilities.



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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