CVE-2021-24161 Explained : Impact and Mitigation

A detailed overview of the vulnerability in Responsive Menu WordPress plugin before version 4.0.4 where attackers could exploit it to achieve remote code execution.

Understanding CVE-2021-24161

This CVE describes a vulnerability in the Responsive Menu WordPress plugin versions earlier than 4.0.4, allowing attackers to upload malicious PHP files and execute remote code on the targeted site.

What is CVE-2021-24161?

In the Responsive Menu (free and Pro) WordPress plugins before 4.0.4, attackers could craft a request and trick an administrator into uploading a zip archive containing malicious PHP files. The attacker could then access those files to achieve remote code execution and further infect the targeted site.

The Impact of CVE-2021-24161

The vulnerability could lead to unauthorized access to sensitive information, server hijacking, and compromise of the affected website's integrity.

Technical Details of CVE-2021-24161

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows attackers to perform Cross-Site Request Forgery (CSRF) attacks to upload malicious PHP files and execute remote code on the website.

Affected Systems and Versions

All versions of Responsive Menu WordPress plugin prior to 4.0.4 are affected by this vulnerability.

Exploitation Mechanism

Attackers can manipulate requests to trick an administrator into uploading a zip file containing malicious PHP files. This enables them to achieve remote code execution on the target WordPress site.

Mitigation and Prevention

Protecting your website from CVE-2021-24161 requires immediate action and long-term preventive measures.

Immediate Steps to Take

Update the Responsive Menu plugin to version 4.0.4 or above to eliminate the vulnerability.
Monitor website access logs for any suspicious activities or file uploads.

Long-Term Security Practices

Regularly update all plugins and themes to their latest versions.
Implement a Web Application Firewall (WAF) to filter out malicious traffic.

Patching and Updates

Stay informed about security advisories and promptly apply patches released by plugin developers to address known vulnerabilities.