CVE-2018-21261 Explained : Impact and Mitigation

A vulnerability in Mattermost Server versions 4.8.1, 4.7.4, and 4.6.3 could lead to unintended and excessive invitation privileges due to disclosure of team invite_id in email invitations.

Understanding CVE-2018-21261

This CVE involves a security issue in Mattermost Server versions that could result in unauthorized access.

What is CVE-2018-21261?

The vulnerability in Mattermost Server versions 4.8.1, 4.7.4, and 4.6.3 exposes team invite_id in email invitations, allowing unauthorized users to gain excessive invitation privileges.

The Impact of CVE-2018-21261

The disclosure of team invite_id can lead to unauthorized access and potential misuse of invitation privileges, compromising the security and integrity of the system.

Technical Details of CVE-2018-21261

This section provides detailed technical information about the vulnerability.

Vulnerability Description

An issue in Mattermost Server versions before 4.8.1, 4.7.4, and 4.6.3 exposes the team invite_id in email invitations, granting unintended excessive invitation privileges.

Affected Systems and Versions

Mattermost Server versions 4.8.1, 4.7.4, and 4.6.3

Exploitation Mechanism

Unauthorized users can exploit the disclosed team invite_id in email invitations to gain excessive invitation privileges, potentially compromising system security.

Mitigation and Prevention

Protect your system from this vulnerability by following these steps:

Immediate Steps to Take

Update Mattermost Server to a patched version that addresses the vulnerability.
Monitor user invitations and access privileges to detect any unauthorized activities.

Long-Term Security Practices

Regularly review and update security protocols to prevent similar vulnerabilities.
Educate users on secure invitation practices and the importance of safeguarding sensitive information.

Patching and Updates

Apply security patches provided by Mattermost promptly to mitigate the vulnerability and enhance system security.