CVE-2025-9081 Details
Description
Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate access controls which allows any authenticated user to download sensitive files via board file download endpoint using UUID enumeration
A vulnerability exists in Mattermost versions 10.5.x prior to 10.5.8 and 9.11.x prior to 9.11.17, where the application fails to properly validate access controls. This flaw enables any authenticated user to download sensitive files by exploiting the board file download endpoint through UUID enumeration.
Users can upgrade to Mattermost versions 10.12.0 or 10.11.0 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 Sep 19, 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-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| mattermost mattermost server | >= 9.11.0, < 9.11.17 >= 10.5.0, < 10.5.9 |
CPE
Remediation
| |
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 |
| Sep 25, 2025 | Initial Analysis | [email protected] |
| Sep 19, 2025 | New CVE Received | [email protected] |