Description
Mattermost versions 10.7.x <= 10.7.0, 10.6.x <= 10.6.2, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fails to properly invalidate personal access tokens upon user deactivation, allowing deactivated users to maintain full system access by exploiting access token validation flaws via continued usage of previously issued tokens.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mattermost | Mattermost | 10.7.0, 10.6.0 – ≤ 10.6.2, 10.5.0 – ≤ 10.5.3, 9.11.0 – ≤ 9.11.12 | 10.8.0 |
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 | 0.0.20250612T141001-1.1 | openSUSE-SU-2025:15225-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | >= 9.0.0-rc1+incompatible, < 9.11.13+incompatible · >= 10.0.0-rc1+incompatible, < 10.5.4+incompatible · >= 10.6.0-rc1+incompatible, < 10.6.3+incompatible · >= 10.7.0-rc1+incompatible, < 10.7.1+incompatible | 9.11.13+incompatible, 10.5.4+incompatible, 10.6.3+incompatible, 10.7.1+incompatible | GO-2025-3731 |
| Go | github.com/mattermost/mattermost-server/v5 | all versions | — | GO-2025-3731 |
| Go | github.com/mattermost/mattermost-server/v6 | all versions | — | GO-2025-3731 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.7.0-rc1, < 10.7.1 | 10.7.1 | GHSA-mc2f-jgj6-6cp3 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.6.0-rc1, < 10.6.3 | 10.6.3 | GHSA-mc2f-jgj6-6cp3 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.0.0-rc1, < 10.5.4 | 10.5.4 | GHSA-mc2f-jgj6-6cp3 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.0.0-rc1, < 9.11.13 | 9.11.13 | GHSA-mc2f-jgj6-6cp3 |
| Go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250402193107-65343f84a783 | 8.0.0-20250402193107-65343f84a783 | GHSA-mc2f-jgj6-6cp3 |
Advisories 2
- openSUSE-SU-2025:15225-1 govulncheck-vulndb-0.0.20250612T141001-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- WID-SEC-2025-0905 Mattermost: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 11, 2025