CVE-2021-36021 Explained : Impact and Mitigation

Magento Commerce CMS Page Improper Input Validation Could Lead To Remote Code Execution

Understanding CVE-2021-36021

Magento versions 2.4.2 (and earlier), 2.4.2-p1 (and earlier), and 2.3.7 (and earlier) are affected by an Improper input validation vulnerability within the CMS page scheduled update feature. An authenticated attacker with administrative privilege could leverage this vulnerability to achieve remote code execution on the system.

What is CVE-2021-36021?

The vulnerability in Magento Commerce allows an authenticated attacker with administrative privileges to exploit an improper input validation flaw within the CMS page scheduled update feature. This exploitation could lead to remote code execution on the affected system.

The Impact of CVE-2021-36021

The impact of CVE-2021-36021 is rated as HIGH. An attacker could exploit this vulnerability to achieve remote code execution on the system, potentially leading to severe consequences such as unauthorized access, data theft, and system compromise.

Technical Details of CVE-2021-36021

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability arises due to improper input validation within the CMS page scheduled update feature of Magento versions 2.4.2, 2.4.2-p1, and 2.3.7. An attacker with administrative privileges could exploit this flaw to execute arbitrary code remotely.

Affected Systems and Versions

Magento versions 2.4.2, 2.4.2-p1, and 2.3.7 are affected by this vulnerability. Systems with these versions installed are at risk of exploitation by attackers with administrative privileges.

Exploitation Mechanism

To exploit this vulnerability, an authenticated attacker with administrative privileges would submit crafted input to the CMS page scheduled update feature. By doing so, the attacker could execute malicious code remotely on the target system.

Mitigation and Prevention

Protect your systems from CVE-2021-36021 by following these mitigation and prevention strategies.

Immediate Steps to Take

Update Magento to a patched version that addresses the vulnerability.
Monitor network traffic for any signs of exploitation or unauthorized access.

Long-Term Security Practices

Regularly apply security updates and patches to Magento installations.
Implement least privilege access controls to limit the capabilities of potential attackers.
Conduct security assessments and audits to identify and address any vulnerabilities proactively.

Patching and Updates

Refer to the Adobe advisory for CVE-2021-36021 at Adobe Magento Security Advisory for instructions on patching and updating your Magento installations.