CVE-2021-25893 : Security Advisory and Response

Magnolia CMS from version 6.1.3 to 6.2.3 is impacted by a stored cross-site scripting (XSS) vulnerability in the setText parameter of /magnoliaAuthor/.magnolia/.

Understanding CVE-2021-25893

This section provides insights into the vulnerability and its impact, along with technical details and mitigation steps.

What is CVE-2021-25893?

The vulnerability in Magnolia CMS enables attackers to execute malicious scripts in the context of a user's session, potentially leading to data theft or unauthorized actions.

The Impact of CVE-2021-25893

The XSS vulnerability could be exploited by adversaries to inject harmful code into web pages viewed by other users, compromising data confidentiality and integrity.

Technical Details of CVE-2021-25893

Let's delve into the specifics of the vulnerability.

Vulnerability Description

The flaw in the setText parameter allows threat actors to store and execute XSS payloads, posing a serious risk to the security of affected systems.

Affected Systems and Versions

Magnolia CMS versions 6.1.3 to 6.2.3 are confirmed to be vulnerable to this XSS exploit, putting users of these versions at risk.

Exploitation Mechanism

By manipulating the setText parameter in /magnoliaAuthor/.magnolia/, attackers can inject malicious scripts, impacting the confidentiality and integrity of data.

Mitigation and Prevention

Here's what you can do to safeguard your systems against CVE-2021-25893.

Immediate Steps to Take

Users are advised to update Magnolia CMS to version 6.2.4 or apply patches provided by the vendor to mitigate the XSS vulnerability.

Long-Term Security Practices

Implement strict input validation mechanisms, security headers, and regular security audits to prevent XSS attacks in the future.

Patching and Updates

Stay informed about security updates and patches released by Magnolia CMS to address known vulnerabilities and enhance system security.