CVE-2025-9081
September 19, 2025
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
Affected Packages
github.com/mattermost/mattermost (GO):
Affected version(s) >=v10.5.0 <v10.5.9Fix Suggestion:
Update to version v10.5.9github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v10.5.0-rc1 <v10.5.9Fix Suggestion:
Update to version v10.5.9github.com/mattermost/mattermost-server (GO):
Affected version(s) >=v9.11.0-rc1 <v9.11.18Fix Suggestion:
Update to version v9.11.18github.com/mattermost/mattermost-plugin-boards (GO):
Affected version(s) >=v0.0.0-20250122103535-025ce8d363a0 <v0.0.0-20250716054606-3f3e3becfe1dFix Suggestion:
Update to version v0.0.0-20250716054606-3f3e3becfe1dgithub.com/mattermost/mattermost/server/v8 (GO):
Affected version(s) >=v8.0.0-20230429093631-aac4f2337933 <v8.0.0-20250721095935-11c36f4d1e44Fix Suggestion:
Update to version v8.0.0-20250721095935-11c36f4d1e44github.com/mattermost/mattermost (GO):
Affected version(s) >=v9.11.0 <v9.11.18Fix Suggestion:
Update to version v9.11.18Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
2.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Authorization Bypass Through User-Controlled Key
EPSS
Base Score:
0.01
