CVE-2025-3227 Details
Description
Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly enforce channel member management permissions in playbook runs, allowing authenticated users without the 'Manage Channel Members' permission to add or remove users from public and private channels by manipulating playbook run participants when the run is linked to a channel.
A vulnerability exists in Mattermost versions 10.5.x through 10.5.5, 9.11.x through 9.11.15, 10.8.x through 10.8.0, 10.7.x through 10.7.2, and 10.6.x through 10.6.5. The issue arises from the application's failure to properly enforce permissions related to channel member management during playbook runs. This flaw allows authenticated users lacking the 'Manage Channel Members' permission to add or remove users from both public and private channels. The exploitation involves manipulating playbook run participants when the run is associated with a channel.
Users can upgrade to Mattermost versions 10.9.0, 10.8.2, 10.7.4, 10.6.6, or 9.11.17 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 23, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://mattermost.com/security-updates | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-863 | Incorrect Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| mattermost mattermost server | >= 9.11.0, < 9.11.16 >= 10.5.0, < 10.5.6 >= 10.6.0, < 10.6.6 >= 10.7.0, < 10.7.3 10.8.0 - 10.8.0 rc1 10.8.0 rc2 10.8.0 rc3 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jul 8, 2025 | Initial Analysis | [email protected] |
| Jun 20, 2025 | New CVE Received | [email protected] |