medium4.3
CVE-2025-3227
Mattermost allows unauthorized channel member management through playbook runs
Impact
Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly enforce channel member management permissions in playbook runs, allowing authenticated users without the 'Manage Channel Members' permission to add or remove users from public and private channels by manipulating playbook run participants when the run is linked to a channel.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost-server | < 0.0.0-20250520060012-d0380305ef7a | 0.0.0-20250520060012-d0380305ef7a |
| go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250520060012-d0380305ef7a | 8.0.0-20250520060012-d0380305ef7a |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Mattermost Server | from 9.11.0 before 9.11.16 from 10.5.0 before 10.5.6 from 10.6.0 before 10.6.6 from 10.7.0 before 10.7.3 Version 10.8.0 |