CVE-2021-4368 : Security Advisory and Response

A detailed article about the CVE-2021-4368 vulnerability affecting the Frontend File Manager Plugin for WordPress.

Understanding CVE-2021-4368

This article delves into the impact, technical details, and mitigation strategies for CVE-2021-4368.

What is CVE-2021-4368?

The Frontend File Manager plugin for WordPress is vulnerable to an Authenticated Settings Change exploit, allowing unauthorized access to plugin settings, potentially leading to remote code execution.

The Impact of CVE-2021-4368

The vulnerability allows subscriber-level attackers to modify plugin settings, such as permitted file types, which can be exploited to execute malicious code through other vulnerabilities.

Technical Details of CVE-2021-4368

Understand the vulnerability description, affected systems, and exploitation mechanism of CVE-2021-4368.

Vulnerability Description

The vulnerability in the Frontend File Manager plugin up to version 18.2 lacks capability checks and a security nonce on the wpfm_save_settings AJAX action, enabling unauthorized settings changes.

Affected Systems and Versions

The Frontend File Manager plugin versions up to and including 18.2 are impacted by this vulnerability, while version 18.3 and above are considered unaffected.

Exploitation Mechanism

By exploiting this vulnerability, attackers with subscriber-level access can tamper with plugin settings, potentially leading to remote code execution through other security flaws.

Mitigation and Prevention

Discover immediate steps to secure your WordPress site and long-term security practices to prevent similar vulnerabilities.

Immediate Steps to Take

Website administrators should update the Frontend File Manager plugin to version 18.3 or higher, restrict access permissions, and monitor for unauthorized activities.

Long-Term Security Practices

Implement strong user access controls, regularly audit plugin settings, and stay informed about security patches and updates for all installed plugins.

Patching and Updates

Regularly check for plugin updates, apply security patches promptly, and consider removing plugins with known vulnerabilities to enhance WordPress site security.