CVE-2021-36020 : What You Need to Know

Magento Commerce versions 2.4.2, 2.4.2-p1, and 2.3.7 are affected by an XML Injection vulnerability in the 'City' field, potentially leading to remote code execution by an unauthenticated attacker.

Understanding CVE-2021-36020

This CVE involves an XML Injection vulnerability in Magento Commerce that allows an attacker to execute malicious scripts remotely.

What is CVE-2021-36020?

Magento Commerce versions 2.4.2, 2.4.2-p1, and 2.3.7 are susceptible to an XML Injection flaw in the 'City' field, enabling an unauthenticated attacker to achieve remote code execution.

The Impact of CVE-2021-36020

The impact of this vulnerability is rated as HIGH with a CVSS base score of 8.2. It could lead to unauthorized remote code execution and compromise the confidentiality of data stored within the affected systems.

Technical Details of CVE-2021-36020

This section provides a deeper insight into the technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from improper validation of user-supplied data in the 'City' field, allowing an attacker to inject malicious XML code leading to remote code execution.

Affected Systems and Versions

Magento Commerce versions 2.4.2, 2.4.2-p1, and 2.3.7 are affected by this vulnerability.

Exploitation Mechanism

An unauthenticated attacker can exploit the XML Injection vulnerability in the 'City' field by crafting malicious scripts that, when executed, can trigger remote code execution.

Mitigation and Prevention

To safeguard systems from CVE-2021-36020, immediate actions and long-term security practices are vital.

Immediate Steps to Take

Update Magento Commerce to a non-vulnerable version immediately.
Implement strong input validation mechanisms to prevent XML Injection attacks.
Monitor network traffic and system logs for any suspicious activity.

Long-Term Security Practices

Regularly update and patch Magento Commerce to address security vulnerabilities promptly.
Conduct security audits and assessments to identify and mitigate potential risks.

Patching and Updates

Stay informed about security updates released by Adobe for Magento Commerce and apply patches without delay to ensure protection against known vulnerabilities.