CVE-2021-36833 : Security Advisory and Response

This article provides detailed information about CVE-2021-36833, a vulnerability found in the WordPress MC4WP plugin version <= 4.8.6, leading to Authenticated Stored Cross-Site Scripting (XSS) attacks.

Understanding CVE-2021-36833

This section delves into the nature of the vulnerability, its impact, affected systems, exploitation mechanisms, and mitigation strategies.

What is CVE-2021-36833?

The vulnerability identified as CVE-2021-36833 is an Authenticated Stored Cross-Site Scripting (XSS) security flaw in the ibericode's MC4WP plugin version <= 4.8.6 for WordPress.

The Impact of CVE-2021-36833

The vulnerability allows attackers with admin-level or higher privileges to execute malicious scripts, potentially compromising the confidentiality and integrity of the affected system.

Technical Details of CVE-2021-36833

This section provides more insights into the vulnerability's description, affected systems, versions, and how it can be exploited.

Vulnerability Description

This vulnerability arises due to improper input validation, enabling attackers to inject and execute malicious scripts through the affected plugin.

Affected Systems and Versions

The issue affects the MC4WP: Mailchimp for WordPress plugin version <= 4.8.6 developed by ibericode.

Exploitation Mechanism

To exploit this vulnerability, an attacker needs admin or higher user role access to the WordPress site using the vulnerable plugin version.

Mitigation and Prevention

In this section, we highlight immediate steps to secure systems against this vulnerability and ensure long-term protection.

Immediate Steps to Take

Users are advised to update the MC4WP plugin to version 4.8.7 or higher to mitigate the risk of exploitation by malicious actors.

Long-Term Security Practices

Implementing regular security audits, enforcing the principle of least privilege, and educating users on safe practices can enhance overall security posture.

Patching and Updates

Staying vigilant for security updates, promptly applying patches, and monitoring for any unusual activities can help prevent exploitation of known vulnerabilities.