CVE-2017-18891 Explained : Impact and Mitigation

A vulnerability allowing for Phishing attacks has been discovered in versions prior to 4.2.0, 4.1.1, and 4.0.5 of Mattermost Server due to the presence of a link in error pages.

Understanding CVE-2017-18891

This CVE identifies a security flaw in Mattermost Server versions before 4.2.0, 4.1.1, and 4.0.5 that can be exploited for Phishing attacks.

What is CVE-2017-18891?

CVE-2017-18891 is a vulnerability in Mattermost Server that allows attackers to conduct Phishing attacks by leveraging a link present in error pages.

The Impact of CVE-2017-18891

The presence of this vulnerability can lead to successful Phishing attacks, potentially compromising user data and system security.

Technical Details of CVE-2017-18891

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability in Mattermost Server versions before 4.2.0, 4.1.1, and 4.0.5 enables Phishing attacks through the inclusion of a link in error pages.

Affected Systems and Versions

Mattermost Server versions prior to 4.2.0
Mattermost Server versions prior to 4.1.1
Mattermost Server versions prior to 4.0.5

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting Phishing attacks that utilize the link embedded in error pages to deceive users.

Mitigation and Prevention

Protecting systems from CVE-2017-18891 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Mattermost Server to version 4.2.0 or newer to mitigate the vulnerability.
Educate users about Phishing techniques and encourage vigilance when interacting with links.

Long-Term Security Practices

Regularly monitor and audit error pages for any suspicious links or content.
Implement email filtering and security awareness training to enhance overall cybersecurity posture.

Patching and Updates

Apply patches and updates provided by Mattermost promptly to address security vulnerabilities and enhance system resilience.