Vulnerability · Published Jun 20, 2025 · Assigned by Mattermost
CVE-2025-3227Unauthorized channel member management through playbook runs
Medium 4.3
In plain English
A medium-severity incorrect authorization in Mattermost from Mattermost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | 0.0.0-20250520060012-d0380305ef7a, 10.5.6+incompatible, 10.6.6+incompatible, 10.7.3+incompatible, 10.8.1+incompatible, 9.11.16+incompatible | GO-2025-3772 |
| Go | github.com/mattermost/mattermost-server | 0.0.0-20250520060012-d0380305ef7a | GHSA-qwwm-c582-82rx |
| Go | github.com/mattermost/mattermost-server/v5 | no fix listed | GO-2025-3772 |
| Go | github.com/mattermost/mattermost-server/v6 | no fix listed | GO-2025-3772 |
| Go | github.com/mattermost/mattermost/server/v8 | 10.8.1 | GHSA-qwwm-c582-82rx |
| Go | github.com/mattermost/mattermost/server/v8 | 10.7.3 | GHSA-qwwm-c582-82rx |
| Go | github.com/mattermost/mattermost/server/v8 | 10.6.6 | GHSA-qwwm-c582-82rx |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250520060012-d0380305ef7a | GO-2025-3772 |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250520060012-d0380305ef7a | GHSA-qwwm-c582-82rx |
| Go | github.com/mattermost/mattermost/server/v8 | 10.5.6 | GHSA-qwwm-c582-82rx |
| Go | github.com/mattermost/mattermost/server/v8 | 9.11.16 | GHSA-qwwm-c582-82rx |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 10.5.0 – through 10.5.59.11.0 – through 9.11.1510.8.010.7.0 – through 10.7.210.6.0 – through 10.6.5 |
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N