CVE-2020-25813 : Security Advisory and Response

In MediaWiki before 1.31.10 and 1.32.x through 1.34.x before 1.34.4, Special:UserRights exposes the existence of hidden users.

Understanding CVE-2020-25813

This CVE relates to a vulnerability in MediaWiki that could potentially expose hidden user information.

What is CVE-2020-25813?

The vulnerability in MediaWiki versions before 1.31.10 and 1.32.x through 1.34.x before 1.34.4 allows the Special:UserRights feature to reveal the presence of hidden users.

The Impact of CVE-2020-25813

The exposure of hidden user information can lead to privacy breaches and unauthorized access to sensitive user data within MediaWiki installations.

Technical Details of CVE-2020-25813

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability in Special:UserRights in affected MediaWiki versions allows hidden users to be exposed, compromising user privacy.

Affected Systems and Versions

MediaWiki versions before 1.31.10
MediaWiki 1.32.x through 1.34.x before 1.34.4

Exploitation Mechanism

The vulnerability can be exploited by accessing the Special:UserRights feature in the affected MediaWiki versions, revealing hidden user accounts.

Mitigation and Prevention

Protecting systems from CVE-2020-25813 is crucial to maintaining security.

Immediate Steps to Take

Upgrade MediaWiki to version 1.31.10 or higher to mitigate the vulnerability.
Regularly monitor user permissions and access rights to detect any unauthorized changes.

Long-Term Security Practices

Implement strict access controls and user permission management practices.
Conduct regular security audits and vulnerability assessments to identify and address potential risks.

Patching and Updates

Apply security patches provided by MediaWiki promptly to address known vulnerabilities and enhance system security.