CVE-2025-6227 - CVE House
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Status published Low CVE-2025-6227

Invite token is used as part of the secure communication

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Miguel de la Cruz

References

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Affected Vendor

Affected Software

Mattermost
Vulnerable Versions:
10.5.0, 9.11.0, 10.9.0, 10.5.8, 9.11.17

Timeline

Official Publish: July 18th, 2025
Last Modified: July 18th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N

Weaknesses (CWE)

CWE-522

MITRE ATT&CK TTPs

T1552 Unsecured Credentials
Credential Access
T1555 Credentials from Password Stores
Credential Access
T1078 Valid Accounts
Persistence
T1021 Remote Services
Lateral Movement
T1098 Account Manipulation
Privilege Escalation