CVE-2020-14457 : Vulnerability Insights and Analysis

An issue was discovered in Mattermost Server before 5.20.0 where non-members can receive broadcasted team details via the update_team WebSocket event, known as MMSA-2020-0012.

Understanding CVE-2020-14457

This CVE identifies a vulnerability in Mattermost Server that allows non-members to access broadcasted team details.

What is CVE-2020-14457?

The vulnerability in Mattermost Server before version 5.20.0 enables non-members to obtain team information through the update_team WebSocket event.

The Impact of CVE-2020-14457

This vulnerability could lead to unauthorized access to sensitive team details by non-members, compromising the confidentiality of the information.

Technical Details of CVE-2020-14457

This section provides technical insights into the vulnerability.

Vulnerability Description

The issue in Mattermost Server allows non-members to receive broadcasted team details through the update_team WebSocket event.

Affected Systems and Versions

Affected Product: Mattermost Server
Affected Versions: Before 5.20.0

Exploitation Mechanism

Non-members exploit the update_team WebSocket event to access team details, breaching confidentiality.

Mitigation and Prevention

Protect your system from CVE-2020-14457 with these mitigation strategies.

Immediate Steps to Take

Upgrade Mattermost Server to version 5.20.0 or later to mitigate the vulnerability.
Restrict access to the update_team WebSocket event to authorized team members only.

Long-Term Security Practices

Regularly monitor and audit WebSocket events for unauthorized access.
Educate team members on the importance of data confidentiality and access control.

Patching and Updates

Stay updated with security advisories from Mattermost and promptly apply patches to address known vulnerabilities.