CVE-2021-45038 : Security Advisory and Response

An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. Attackers can view private wiki contents by using an action=rollback query.

Understanding CVE-2021-45038

This CVE involves a security vulnerability in certain versions of MediaWiki that could lead to unauthorized access to private wiki content.

What is CVE-2021-45038?

CVE-2021-45038 is a security flaw in MediaWiki versions prior to 1.35.5, 1.36.3, and 1.37.1 that allows malicious actors to access private wiki information through a specific query.

The Impact of CVE-2021-45038

The vulnerability permits attackers to view sensitive content on affected wiki platforms, potentially exposing confidential data.

Technical Details of CVE-2021-45038

This section delves into the specifics of the vulnerability in MediaWiki.

Vulnerability Description

The issue allows unauthorized users to access private wiki contents through the use of an action=rollback query, breaching security protocols.

Affected Systems and Versions

MediaWiki versions before 1.35.5
MediaWiki 1.36.x versions before 1.36.3
MediaWiki 1.37.x versions before 1.37.1

Exploitation Mechanism

Attackers exploit the vulnerability by crafting a specific query using action=rollback to gain access to private wiki content.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate actions and long-term security measures.

Immediate Steps to Take

Update MediaWiki to the patched versions (1.35.5, 1.36.3, or 1.37.1)
Monitor and restrict access to sensitive wiki content

Long-Term Security Practices

Regularly audit and monitor access logs
Educate users on secure query practices

Patching and Updates

Ensure timely application of security patches and updates to MediaWiki to mitigate the CVE-2021-45038 vulnerability.