GHSA-h5v9-xw2g-7hrq
Mattermost allows members with permission to convert public channels to private and convert private to public
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.4.0, < 10.4.3 | 10.4.3 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.3.0, < 10.3.4 | 10.3.4 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.11.0, < 9.11.9 | 9.11.9 |
| Go | github.com/mattermost/mattermost-server | < 9.11.9 | 9.11.9 |
| Go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250218135018-e644e3c8e393 | 8.0.0-20250218135018-e644e3c8e393 |
Details
As written in the advisory (Markdown source, shown as plain text).
Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to to enforce channel conversion restrictions, which allows members with permission to convert public channels to private ones to also convert private ones to public.
References
External links from the advisory. They lead to third-party sites.