CVE-2021-21020 : What You Need to Know

Magento Commerce versions 2.4.1, 2.4.0-p1, and 2.3.6 are vulnerable to an access control bypass vulnerability, allowing unauthorized access to restricted resources.

Understanding CVE-2021-20657

This CVE involves an improper access control vulnerability in Magento Commerce, potentially leading to unauthorized access.

What is CVE-2021-20657?

Magento versions 2.4.1 (and earlier), 2.4.0-p1 (and earlier), and 2.3.6 (and earlier) are susceptible to an access control bypass flaw in the Login as Customer module. Exploitation could result in unauthorized access to restricted resources.

The Impact of CVE-2021-20657

The vulnerability poses a medium severity risk with a CVSS base score of 5.3. Successful exploitation could compromise the integrity of the system without requiring privileges.

Technical Details of CVE-2021-20657

This section provides deeper insights into the vulnerability's description, affected systems, and the exploitation mechanism.

Vulnerability Description

The flaw allows attackers to bypass access controls in the Login as Customer module, potentially enabling them to access restricted resources.

Affected Systems and Versions

Magento Commerce versions 2.4.1, 2.4.0-p1, and 2.3.6 are impacted by this vulnerability, exposing them to unauthorized access risks.

Exploitation Mechanism

Successful exploitation of this vulnerability can lead to unauthorized access to restricted resources, compromising system integrity without needing special privileges.

Mitigation and Prevention

To address CVE-2021-20657, follow immediate steps and adopt long-term security practices.

Immediate Steps to Take

Update Magento Commerce to the latest patched version to mitigate the vulnerability.
Monitor for any unauthorized access or suspicious activities on the system.

Long-Term Security Practices

Regularly update Magento Commerce and apply security patches promptly.
Conduct security audits to identify and address vulnerabilities proactively.

Patching and Updates

Stay informed about security advisories from Adobe regarding Magento Commerce to apply relevant patches and updates timely.