GHSA-5263-pm2h-m7hw
Mattermost doesn't restrict which roles can promote a user as system admin
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.9.0, < 9.9.2 | 9.9.2 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.5.0, < 9.5.8 | 9.5.8 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.10.0, < 9.10.1 | 9.10.1 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.8.0, < 9.8.3 | 9.8.3 |
Details
As written in the advisory (Markdown source, shown as plain text).
Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 and 9.8.x <= 9.8.2 fail to restrict which roles can promote a user as system admin which allows a System Role with edit access to the permissions section of system console to update their role (e.g. member) to include the `manage_system` permission, effectively becoming a System Admin.
References
External links from the advisory. They lead to third-party sites.