CVE-2019-20865 : What You Need to Know

A vulnerability has been identified in earlier versions of Mattermost Server where the login page is susceptible to CSRF attacks.

Understanding CVE-2019-20865

This CVE identifies a security issue in Mattermost Server versions prior to 5.12.0, 5.11.1, 5.10.2, 5.9.2, and 4.10.10.

What is CVE-2019-20865?

CVE-2019-20865 is a vulnerability in Mattermost Server that allows for Cross-Site Request Forgery (CSRF) attacks on the login page.

The Impact of CVE-2019-20865

The vulnerability could potentially allow malicious actors to perform unauthorized actions on behalf of authenticated users, leading to data breaches or unauthorized access.

Technical Details of CVE-2019-20865

This section provides more technical insights into the CVE.

Vulnerability Description

The login page of affected Mattermost Server versions is vulnerable to CSRF attacks, which can be exploited by attackers.

Affected Systems and Versions

Mattermost Server versions before 5.12.0, 5.11.1, 5.10.2, 5.9.2, and 4.10.10

Exploitation Mechanism

Attackers can craft malicious requests that are executed on behalf of authenticated users, potentially leading to unauthorized actions.

Mitigation and Prevention

Protect your systems and data from this vulnerability.

Immediate Steps to Take

Upgrade Mattermost Server to versions 5.12.0, 5.11.1, 5.10.2, 5.9.2, or 4.10.10 to mitigate the CSRF vulnerability.
Implement CSRF tokens and secure coding practices to prevent CSRF attacks.

Long-Term Security Practices

Regularly update and patch software to address security vulnerabilities.
Conduct security audits and penetration testing to identify and mitigate potential risks.

Patching and Updates

Stay informed about security updates and patches released by Mattermost.
Apply patches promptly to ensure your systems are protected against known vulnerabilities.