CVE-2021-36021

CRITICAL

Magento affected by remote code execution vulnerability in the CMS page scheduled update feature

Published September 6, 2023Updated November 6, 2025Source: osv

Summary

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.

Remediation

Upgrade to the fixed version using your package manager.

Composer

Update magento/community-edition to 2.3.7-p1 or later

composer require "magento/community-edition:^2.3.7-p1"

Composer

Update magento/community-edition to 2.4.2-p2 or later

composer require "magento/community-edition:^2.4.2-p2"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (5)

Package	Ecosystem	Affected	Fixed In
magento/community-edition	packagist	2.3.7	No fix available
magento/community-edition	packagist	2.4.2	No fix available
magento/project-community-edition	packagist	0.1.0-alpha100, 0.1.0-alpha101, 0.1.0-alpha102, 0.1.0-alpha103 (+49 more)	Range-based data available
magento/community-edition	packagist	0.1.0-alpha100, 0.1.0-alpha101, 0.1.0-alpha102, 0.1.0-alpha103 (+118 more)	2.3.7-p1
magento/community-edition	packagist	2.4.2-p1	2.4.2-p2

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-20
Improper Input ValidationMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.1 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2021-36021?: Magento affected by remote code execution vulnerability in the CMS page scheduled update feature This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.1/10).
How do I check if my project is affected by CVE-2021-36021?: CVE-2021-36021 affects magento/community-edition and magento/project-community-edition. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2021-36021 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

9.1

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-4g27-q2w9-m8m8

BIT-magento-2021-36021

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