GHSA-58w6-w55x-6wq8
Mattermost fails to validate user permissions in Boards
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250905150616-ba86dfc5876b | 8.0.0-20250905150616-ba86dfc5876b |
| Go | github.com/mattermost/mattermost | >= 10.11.0, < 10.11.5 | 10.11.5 |
| Go | github.com/mattermost/mattermost | >= 10.5.0, < 10.5.13 | 10.5.13 |
Details
As written in the advisory (Markdown source, shown as plain text).
Mattermost versions 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate the user permission when accessing the files and subscribing to the block in Boards, which allows an authenticated user to access other board files and was able to subscribe to the block from other boards that the user does not have access to
References
External links from the advisory. They lead to third-party sites.