CVE-2025-6227 json
Invite token is used as part of the secure communication
published 2025-07-18 15 mo ago modified 2026-06-17 4 mo ago also GHSA-4fwj-8595-wp25 , GO-2025-3818 , EUVD-2025-21876
- cvss
- 2.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 12%
- public exploits
- 0
- none known
Summary
Mattermost versions 10.5.x <= 10.5.7, 9.11.x <= 9.11.16 fail to negotiate a new token when accepting the invite which allows a user that intercepts both invite and password to send synchronization payloads to the server that originally created the invite via the REST API.
Patch / fix
- go github.com/mattermost/mattermost-server 9.11.17, 9.11.17+incompatible, 10.5.8, 10.5.8+incompatible
- go github.com/mattermost/mattermost/server/v8 8.0.0-20250612074655-8f8612c63783
- Mattermost Mattermost 9.11.17, 10.5.8, 10.9.0
- govulncheck-vulndb openSUSE Tumbleweed 0.0.20250730T213748-1.1
opensuse advisories openSUSE-SU-2025:15405-1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 15 mo ago
Exploit prediction
0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 2.2 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N |
| NVD | 3.1 | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N |
| GitHub | 3.1 | 2.2 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost-server | >=10.5.0, <10.5.8 >=9.11.0, <9.11.17 >=9.11.0+incompatible, <9.11.17+incompatible >=10.5.0+incompatible, <10.5.8+incompatible |
10.5.8 9.11.17 9.11.17+incompatible 10.5.8+incompatible |
| go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20250612074655-8f8612c63783 |
8.0.0-20250612074655-8f8612c63783 |
| 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-522 Insufficiently Protected Credentials
References
Sources
- CVE List CVE-2025-6227
- GitHub Advisory GHSA-4fwj-8595-wp25
- NVD CVE-2025-6227
- OSV GO-2025-3818
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