Headline
GHSA-jwhw-xf5v-qgxc: Mattermost allows guest users to view information about public teams they are not members of
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/{team_id}.
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- GitHub Advisory Database
- GitHub Reviewed
- CVE-2025-4128
Mattermost allows guest users to view information about public teams they are not members of
Low severity GitHub Reviewed Published Jun 11, 2025 to the GitHub Advisory Database • Updated Jun 11, 2025
Package
gomod github.com/mattermost/mattermost-server (Go)
Affected versions
>= 10.5.0, < 10.5.5
>= 9.11.0, < 9.11.14
Patched versions
10.5.5
9.11.14
gomod github.com/mattermost/mattermost/server/v8 (Go)
< 8.0.0-20250422131222-701ddc896a10
8.0.0-20250422131222-701ddc896a10
Description
Published to the GitHub Advisory Database
Jun 11, 2025
Last updated
Jun 11, 2025
EPSS score