CVE-2018-21260 : What You Need to Know

A vulnerability in Mattermost Server versions 4.8.1, 4.7.4, and 4.6.3 allowed the unintentional sending of WebSocket events during user management operations, compromising user privacy.

Understanding CVE-2018-21260

This CVE relates to a privacy violation issue in Mattermost Server versions.

What is CVE-2018-21260?

The vulnerability involved the inadvertent transmission of WebSocket events during specific user management tasks, leading to a breach of user privacy.

The Impact of CVE-2018-21260

The vulnerability could result in a violation of user privacy due to the unauthorized sending of WebSocket events.

Technical Details of CVE-2018-21260

This section provides technical insights into the CVE.

Vulnerability Description

The flaw allowed WebSocket events to be sent unintentionally during user management operations, compromising user privacy.

Affected Systems and Versions

Mattermost Server versions 4.8.1, 4.7.4, and 4.6.3

Exploitation Mechanism

Specific user management operations triggered the unauthorized sending of WebSocket events.

Mitigation and Prevention

Steps to address and prevent the vulnerability.

Immediate Steps to Take

Upgrade to a patched version of Mattermost Server.
Monitor WebSocket events for unusual activity.

Long-Term Security Practices

Regularly update and patch software to prevent vulnerabilities.
Conduct security audits to identify and address potential privacy issues.

Patching and Updates

Apply the latest security updates provided by Mattermost to fix the vulnerability.