CVE-2021-4350 : What You Need to Know

This article provides insights into CVE-2021-4350, a vulnerability found in the Frontend File Manager plugin for WordPress.

Understanding CVE-2021-4350

This section delves into the details of the CVE-2021-4350 vulnerability.

What is CVE-2021-4350?

The Frontend File Manager plugin for WordPress is vulnerable to Unauthenticated HTML Injection in versions up to, and including, 18.2. This allows unauthenticated attackers to send emails using the site with custom content, potentially leading to spam relay attacks.

The Impact of CVE-2021-4350

The vulnerability exposes sites to potential misuse by unauthorized users, compromising the integrity of emails sent and potentially damaging the site's reputation.

Technical Details of CVE-2021-4350

This section provides a deeper look into the technical aspects of CVE-2021-4350.

Vulnerability Description

The vulnerability stems from missing authentication controls on the wpfm_send_file_in_email AJAX action, enabling attackers to send emails with unsanitized HTML content.

Affected Systems and Versions

The Frontend File Manager Plugin versions up to 18.2 are affected, leaving WordPress sites using these versions vulnerable to exploitation.

Exploitation Mechanism

Attackers can exploit this vulnerability to send emails from the affected WordPress site with customized content, potentially leveraging it for spam relay.

Mitigation and Prevention

This section discusses measures to mitigate the risks associated with CVE-2021-4350.

Immediate Steps to Take

WordPress site administrators are advised to update the Frontend File Manager Plugin to version 18.3 or above to mitigate the vulnerability.

Long-Term Security Practices

Implement stringent access controls, regular security audits, and timely updates to prevent similar vulnerabilities in the future.

Patching and Updates

Regularly check for security patches and updates for plugins to ensure the WordPress site remains secure.