CVE-2017-18913 : Security Advisory and Response

A vulnerability has been found in Mattermost Server versions earlier than 3.8.2, 3.7.5, and 3.6.7, leading to Cross-Site Scripting (XSS) when clicking on a link on an error page.

Understanding CVE-2017-18913

This CVE identifies a security issue in Mattermost Server versions prior to 3.8.2, 3.7.5, and 3.6.7 that could result in XSS through link interactions on error pages.

What is CVE-2017-18913?

CVE-2017-18913 is a vulnerability in Mattermost Server that allows for Cross-Site Scripting (XSS) attacks when specific links are clicked on error pages.

The Impact of CVE-2017-18913

The vulnerability could enable malicious actors to execute arbitrary scripts within the context of the user's session, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2017-18913

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

Vulnerability Description

The issue in Mattermost Server versions before 3.8.2, 3.7.5, and 3.6.7 allows for XSS exploitation through links present on error pages.

Affected Systems and Versions

Mattermost Server versions earlier than 3.8.2, 3.7.5, and 3.6.7

Exploitation Mechanism

The vulnerability is exploited when a user interacts with a link displayed on an error page, triggering the XSS attack.

Mitigation and Prevention

Protecting systems from CVE-2017-18913 requires immediate actions and long-term security practices.

Immediate Steps to Take

Upgrade Mattermost Server to version 3.8.2, 3.7.5, or 3.6.7 to mitigate the vulnerability.
Educate users about the risks of clicking on unknown links.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Implement web application firewalls to filter and block malicious traffic.

Patching and Updates

Stay informed about security updates from Mattermost and apply patches promptly to secure the server.