CVE-2021-26027 : Vulnerability Insights and Analysis

An issue was discovered in Joomla! 3.0.0 through 3.9.24 that could allow unauthorized changes to article categories.

Understanding CVE-2021-26027

This CVE refers to an ACL violation within com_content frontend editing in Joomla! CMS versions 3.0.0 to 3.9.24.

What is CVE-2021-26027?

CVE-2021-26027 is a security vulnerability in Joomla! CMS that allows incorrect ACL checks, enabling unauthorized changes to the category of an article.

The Impact of CVE-2021-26027

This vulnerability could be exploited by malicious actors to manipulate article categories without proper authorization, potentially leading to unauthorized content modifications.

Technical Details of CVE-2021-26027

This section covers the technical aspects of the vulnerability.

Vulnerability Description

The issue arises from incorrect ACL checks in Joomla! CMS, specifically within com_content frontend editing, allowing unauthorized modification of article categories.

Affected Systems and Versions

Joomla! CMS versions 3.0.0 through 3.9.24 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by bypassing ACL restrictions, gaining unauthorized access to change article categories.

Mitigation and Prevention

Here are the steps to mitigate and prevent exploitation of CVE-2021-26027.

Immediate Steps to Take

Users are advised to update Joomla! CMS to a patched version and review and adjust ACL settings to prevent unauthorized changes to article categories.

Long-Term Security Practices

Regularly monitor and update Joomla! CMS installations, review access control settings, and educate users on best security practices to prevent similar vulnerabilities.

Patching and Updates

It is crucial to apply security patches released by Joomla! Project promptly to address vulnerabilities and ensure the security of Joomla! CMS installations.