CVE-2021-46364: Deserialization of Untrusted Data in Magnolia CMS

info.magnolia:magnolia-core Updated 02 Oct 2025

Summary

12/02/2022

Disclosed on

CVE-2021-46364

CVE

Yes i

Fix available

High

Severity

7.8

CVSS Score

CVE-2021-46364: Deserialization of Untrusted Data in Magnolia CMS. Affects info.magnolia:magnolia-core versions < 6.2.4. Fixed in 6.2.4. How to fix ↓

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Background

Magnolia CMS is a content management system that allows users to create, manage, and publish digital content. It is built on top of the Java programming language and provides a wide range of features for website development and content authoring. The 'info.magnolia:magnolia-core' package is a core component of Magnolia CMS that handles various functionalities, including parsing YAML files. This package is vulnerable to a deserialization vulnerability in the Snake YAML parser, which can be exploited by attackers to execute arbitrary code by providing a specially crafted YAML file.

Vulnerability Detail

The vulnerability in the 'info.magnolia:magnolia-core' package allows attackers to execute arbitrary code by exploiting a deserialization vulnerability in the Snake YAML parser. By providing a specially crafted YAML file, an attacker can trigger the deserialization of untrusted data, leading to the execution of arbitrary code within the context of the application. This can result in various consequences, including remote code execution, data leakage, and unauthorized access to sensitive information. The vulnerability has a CVSS score of 7.8, indicating a high severity level.

How To Fix

Minimum fixed version

6.2.4

This is the first release that contains the fix.

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Workaround

There is no known workaround for this vulnerability. It is essential to apply the recommended fix by upgrading to the latest version of Magnolia CMS.

Conclusion

The 'info.magnolia:magnolia-core' package in Magnolia CMS is vulnerable to a deserialization vulnerability in the Snake YAML parser. This vulnerability can be exploited by attackers to execute arbitrary code. To mitigate the risk, it is crucial to upgrade to Magnolia CMS version 6.2.4 or above. For further support on vulnerability remediation, please contact DevNack.com.

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