Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.
{ "nvd_published_at": "2025-05-15T11:15:48Z", "cwe_ids": [ "CWE-863" ], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2025-05-17T14:02:03Z" }