CVE-2026-6689: Missing Authorization

Mattermost versions 11.6.x = 11.6.1, 11.5.x = 11.5.4, 10.11.x = 10.11.15, 10.11.x = 10.11.16 Fail to enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation the check was only applied on update/patch, which allows an authenticated user holding...

CVE-2025-41443: Missing Authorization

Mattermost versions 10.5.x = 10.5.12, 10.11.x = 10.11.2 fail to properly validate guest user permissions when accessing channel information which allows guest users to discover active public channels and their metadata via the /api/v4/teams/teamid/channels/ids endpoint...

CVE-2025-53971: Incorrect Authorization

Mattermost versions 10.5.x = 10.5.8, 9.11.x = 9.11.17 fail to properly validate authorization for team scheme role modifications which allows Team Admins to demote Team Members to Guests via the PUT /api/v4/teams/team-id/members/user-id/schemeRoles API endpoint...

CVE-2025-47870: Missing Authentication for Critical Function

Mattermost versions 10.8.x = 10.8.3, 10.5.x = 10.5.8, 9.11.x = 9.11.17, 10.9.x = 10.9.2 fail to sanitize the team invite ID in the POST /api/v4/teams/:teamId/restore endpoint which allows an team admin with no member invite privileges to get the team’s invite id...

CVE-2025-4128: Incorrect Authorization

Mattermost versions 10.5.x = 10.5.4, 9.11.x = 9.11.13 fail to properly restrict API access to team information, allowing guest users to bypass permissions and view information about public teams they are not members of via a direct API call to /api/v4/teams/teamid...

CVE-2023-3584

Mattermost CVE-2023-3584 affects the POST /api/v4/teams endpoint. The root cause is improper authorization checks when a team override scheme ID is supplied, enabling an authenticated attacker who knows a valid Team Override Scheme ID to create a new team using that scheme. Documents consistently...

Mattermost 安全漏洞

Mattermost is an open source collaboration platform from Mattermost, Inc. in the United States. Mattermost suffers from a security vulnerability that stems from not properly checking the authorization of POST/api/v4/teams...