Vulnerability · Published Jun 30, 2025 · Assigned by Mattermost
CVE-2025-47871Mattermost Playbooks exposes private channel metadata to unauthorized users via run metadata API
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 10% 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 validate channel membership when retrieving playbook run metadata, allowing authenticated users who are playbook members but not channel members to access sensitive information about linked private channels including channel name, display name, and participant count through the run metadata API endpoint.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | 0.0.0-20250513065225-4ae5d647fb88, 10.5.6+incompatible, 10.6.6+incompatible, 10.7.3+incompatible, 10.8.1+incompatible, 9.11.16+incompatible | GO-2025-3797 |
| Go | github.com/mattermost/mattermost-server | 0.0.0-20250513065225-4ae5d647fb88 | GHSA-wgvp-jj4w-88hf |
| Go | github.com/mattermost/mattermost-server/v5 | no fix listed | GO-2025-3797 |
| Go | github.com/mattermost/mattermost-server/v6 | no fix listed | GO-2025-3797 |
| Go | github.com/mattermost/mattermost/server/v8 | 10.6.6 | GHSA-wgvp-jj4w-88hf |
| Go | github.com/mattermost/mattermost/server/v8 | 10.7.3 | GHSA-wgvp-jj4w-88hf |
| Go | github.com/mattermost/mattermost/server/v8 | 10.8.1 | GHSA-wgvp-jj4w-88hf |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250513065225-4ae5d647fb88 | GO-2025-3797 |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250513065225-4ae5d647fb88 | GHSA-wgvp-jj4w-88hf |
| Go | github.com/mattermost/mattermost/server/v8 | 9.11.16 | GHSA-wgvp-jj4w-88hf |
| Go | github.com/mattermost/mattermost/server/v8 | 10.5.6 | GHSA-wgvp-jj4w-88hf |
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:N/I:L/A:N