GHSA-hc6v-386m-93pq
Mattermost fails to properly enforce access controls for guest users
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.6.0-rc1, < 10.7.1 | 10.7.1 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.0.0-rc1, < 10.5.4 | 10.5.4 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.0.0-rc1, < 9.11.13 | 9.11.13 |
| Go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250414110750-c23f44fe8ed0 | 8.0.0-20250414110750-c23f44fe8ed0 |
Details
As written in the advisory (Markdown source, shown as plain text).
Mattermost versions 10.7.x <= 10.7.0, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fail to properly enforce access controls for guest users accessing channel member information, allowing authenticated guest users to view metadata about members of public channels via the channel members API endpoint.
References
External links from the advisory. They lead to third-party sites.