Description
Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mattermost | Mattermost | 10.6.0 – ≤ 10.6.1, 10.5.0 – ≤ 10.5.2, 10.4.0 – ≤ 10.4.4, 9.11.0 – ≤ 9.11.11 | 10.7.0 |
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 | 0.0.20250523T151856-1.1 | openSUSE-SU-2025:15159-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | >= 9.11.0+incompatible, < 9.11.12+incompatible · >= 10.4.0+incompatible, < 10.4.5+incompatible · >= 10.5.0+incompatible, < 10.5.3+incompatible · >= 10.6.0+incompatible, < 10.6.2+incompatible | 9.11.12+incompatible, 10.4.5+incompatible, 10.5.3+incompatible, 10.6.2+incompatible | GO-2025-3693 |
| Go | github.com/mattermost/mattermost-server/v5 | all versions | — | GO-2025-3693 |
| Go | github.com/mattermost/mattermost-server/v6 | all versions | — | GO-2025-3693 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.6.0, < 10.6.2 | 10.6.2 | GHSA-r7r2-m3vr-c8qc |
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.5.0, < 10.5.3 | 10.5.3 | GHSA-r7r2-m3vr-c8qc |
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.4.0, < 10.4.5 | 10.4.5 | GHSA-r7r2-m3vr-c8qc |
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.11.0, < 9.11.12 | 9.11.12 | GHSA-r7r2-m3vr-c8qc |
| Go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250415054241-76ab3867b785 | 8.0.0-20250415054241-76ab3867b785 | GHSA-r7r2-m3vr-c8qc |
Advisories 2
- openSUSE-SU-2025:15159-1 govulncheck-vulndb-0.0.20250523T151856-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- WID-SEC-2025-0830 Mattermost: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 25, 2025