CVE-2025-6227

Invite token is used as part of the secure communication

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.

Remediation

Solution:

  • Update Mattermost to versions 10.9.0, 10.5.8, 9.11.17 or higher.

Category

2.2
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.03%
Affected: Mattermost Mattermost
Published at:
Updated at:

References

Link Tags
https://mattermost.com/security-updates

Frequently Asked Questions

What is the severity of CVE-2025-6227?
CVE-2025-6227 has been scored as a low severity vulnerability.
How to fix CVE-2025-6227?
To fix CVE-2025-6227: Update Mattermost to versions 10.9.0, 10.5.8, 9.11.17 or higher.
Is CVE-2025-6227 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-6227 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-6227?
CVE-2025-6227 affects Mattermost Mattermost.
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