GHSA-r7r2-m3vr-c8qc Mattermost Fails to Validate Team Invite Permissions

• Go github.com/mattermost/mattermost/server/v8: >= 10.6.0, < 10.6.2 → fixed in 10.6.2 • Go github.com/mattermost/mattermost/server/v8: >= 10.5.0, < 10.5.3 → fixed in 10.5.3 • Go github.com/mattermost/mattermost/server/v8: >= 10.4.0, < 10.4.5 → fixed in 10.4.5 • Go github.com/mattermost/mattermost/server/v8: >= 9.11.0, < 9.11.12 → fixed in 9.11.12 • Go github.com/mattermost/mattermost/server/v8: < 8.0.0-20250415054241-76ab3867b785 → fixed in 8.0.0-20250415054241-76ab3867b785

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.