CVE-2025-55070 json
Lack of MFA enforcement in WebSocket connections
published 2025-11-14 11 mo ago modified 2026-10-19 21 d ago also GHSA-xpg8-8xpv-948p , GO-2025-4128 , EUVD-2025-186556
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 24%
- public exploits
- 0
- none known
Summary
Mattermost versions <11 fail to enforce multi-factor authentication on WebSocket connections which allows unauthenticated users to access sensitive information via WebSocket events
Patch / fix
- go github.com/mattermost/mattermost-server 11.1.0, 11.1.0+incompatible
- go github.com/mattermost/mattermost/server/v8 8.0.0-20250912063506-7d8b7b5e4a60
- Mattermost Mattermost 11.0.0
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 11 mo ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost-server | <11.1.0 <11.1.0+incompatible |
11.1.0 11.1.0+incompatible |
| go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20250912063506-7d8b7b5e4a60 |
8.0.0-20250912063506-7d8b7b5e4a60 |
| go | github.com/mattermost/mattermost-server/v5 | all versions |
no fix listed |
| go | github.com/mattermost/mattermost-server/v6 | all versions |
no fix listed |
Affected products
- Mattermost Mattermost
Classification
- Weakness
-
- CWE-306 Missing Authentication for Critical Functionality
References
Sources
- CVE List CVE-2025-55070
- GitHub Advisory GHSA-xpg8-8xpv-948p
- NVD CVE-2025-55070
- OSV GO-2025-4128
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