Introduction The recent discovery of CVE-2026-6342 poses significant risks to server security, particularly for those using Mattermost Plugins. System administrators and hosting providers must act swiftly to mitigate vulnerabilities and safeguard their infrastructure. Overview of the Vulnerability CVE-2026-6342 affects Mattermost Plugins versions <=11.5 and allows unauthorized users to create subscriptions to unapproved groups. This flaw […]













