Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization due to insufficient restriction of the groupconstrained channel flag in the channel patch API. An attacker can remove all participants from a group or direct message conversation by enabling the groupconstrained fl...

GO-2026-5311 Mattermost has a Path Traversal issue in github.com/mattermost/mattermost-server

Mattermost has a Path Traversal issue in github.com/mattermost/mattermost-server...

Missing Authentication for Critical Function

Overview Affected versions of this package are vulnerable to Missing Authentication for Critical Function in the POST /ac/installed process during the pending-install window. An attacker can inject a rogue sharedSecret and disrupt the integration by sending unauthenticated requests. Remediation...

GO-2026-4296 Mattermost Server is vulnerable to XSS through display name field in github.com/mattermost/mattermost-server

Mattermost Server is vulnerable to XSS through display name field in github.com/mattermost/mattermost-server...

GO-2026-4303 Mattermost Server is vulnerable CSV Injection in github.com/mattermost/mattermost-server

Mattermost Server is vulnerable CSV Injection in github.com/mattermost/mattermost-server...

GO-2025-4256 Mattermost has an Invite Token Replay Vulnerability via Channel Membership Manipulation in github.com/mattermost/mattermost

Mattermost has an Invite Token Replay Vulnerability via Channel Membership Manipulation in github.com/mattermost/mattermost...

Privilege Context Switching Error

Overview Affected versions of this package are vulnerable to Privilege Context Switching Error in the current user session. An attacker can remove comments created by other users by sending crafted requests with insufficient permission checks. Remediation Upgrade...