Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6 fail to properly restrict channel creation which allows a malicious remote to create arbitrary channels, when shared channels were enabled.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| github.com/mattermost/mattermost/server/v8(Go) | 9.5.0 | 9.5.7 | N/A |
| github.com/mattermost/mattermost/server/v8(Go) | 9.9.0 | 9.9.1 | N/A |
| github.com/mattermost/mattermost/server/v8(Go) | 0 | 8.0.0-20240626164322-c758cecaf30c | N/A |
| github.com/mattermost/mattermost-server(Go) | 9.9.0 | 9.9.1 | N/A |
| github.com/mattermost/mattermost-server/v5(Go) | 0 | 5.3.2-0.20240626164322-c758cecaf30c | N/A |
| github.com/mattermost/mattermost-server/v6(Go) | 0 | 6.0.0-20240626164322-c758cecaf30c | N/A |
| github.com/mattermost/mattermost-server(Go) | 9.5.0 | 9.5.7 | N/A |
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