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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mattermost | Mattermost | 10.5.0 – ≤ 10.5.5, 9.11.0 – ≤ 9.11.15, 10.8.0, 10.7.0 – ≤ 10.7.2, 10.6.0 – ≤ 10.6.5 | 10.9.0 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | govulncheck-vulndb | 0.0.20250730T213748-1.1 | openSUSE-SU-2025:15405-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | < 0.0.0-20250513065225-4ae5d647fb88 | 0.0.0-20250513065225-4ae5d647fb88 | GHSA-wgvp-jj4w-88hf |
| Go | github.com/mattermost/mattermost-server | < 0.0.0-20250513065225-4ae5d647fb88 · >= 9.11.0+incompatible, < 9.11.16+incompatible · >= 10.5.0+incompatible, < 10.5.6+incompatible · >= 10.6.0+incompatible, < 10.6.6+incompatible · >= 10.7.0+incompatible, < 10.7.3+incompatible · >= 10.8.0+incompatible, < 10.8.1+incompatible | 0.0.0-20250513065225-4ae5d647fb88, 9.11.16+incompatible, 10.5.6+incompatible, 10.6.6+incompatible, 10.7.3+incompatible, 10.8.1+incompatible | GO-2025-3797 |
| Go | github.com/mattermost/mattermost-server/v5 | all versions | — | GO-2025-3797 |
| Go | github.com/mattermost/mattermost-server/v6 | all versions | — | GO-2025-3797 |
| Go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250513065225-4ae5d647fb88 | 8.0.0-20250513065225-4ae5d647fb88 | GHSA-wgvp-jj4w-88hf |
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.11.0, < 9.11.16 | 9.11.16 | GHSA-wgvp-jj4w-88hf |
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.5.0, < 10.5.6 | 10.5.6 | GHSA-wgvp-jj4w-88hf |
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.6.0, < 10.6.6 | 10.6.6 | GHSA-wgvp-jj4w-88hf |
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.7.0, < 10.7.3 | 10.7.3 | GHSA-wgvp-jj4w-88hf |
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.8.0, < 10.8.1 | 10.8.1 | GHSA-wgvp-jj4w-88hf |
Advisories 1
- openSUSE-SU-2025:15405-1 govulncheck-vulndb-0.0.20250730T213748-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026