CVE-2025-55070
Mattermost versions <11 fail to enforce multi-factor authentication on WebSocket connections which allows unauthenticated users to access sensitive information via WebSocket events
- CVSS 3.1
- 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 24% of CVEs (scores of 2026-10-25)
- CWE
- CWE-306
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-xpg8-8xpv-948p | Go | github.com/mattermost/mattermost-server | <11.1.0 | 11.1.0 |
| GHSA-xpg8-8xpv-948p | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20250912063506-7d8b7b5e4a60 | 8.0.0-20250912063506-7d8b7b5e4a60 |
| GO-2025-4128 | Go | github.com/mattermost/mattermost-server | <11.1.0+incompatible | 11.1.0+incompatible |
| GO-2025-4128 | Go | github.com/mattermost/mattermost-server/v5 | all versions | no fix published |
| GO-2025-4128 | Go | github.com/mattermost/mattermost-server/v6 | all versions | no fix published |
| GO-2025-4128 | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20250912063506-7d8b7b5e4a60 | 8.0.0-20250912063506-7d8b7b5e4a60 |