CVE-2025-9081

IDOR in board file download allows any user to download any file by UUID

Published Sep 19, 2025 CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed
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

Remediation

Vendor Solution

Update Mattermost to versions 10.11.0, 10.5.9, 9.11.18 or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-30247 Mattermost boards plugin fails to restrict download access to files
Github GHSA Github GHSA GHSA-f72g-52v7-mg3p Mattermost boards plugin fails to restrict download access to files
References
History
Type Values Removed Values Added
First Time appeared Mattermost mattermost Server
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Vendors & Products Mattermost mattermost Server
Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost
Vendors & Products Mattermost
Mattermost mattermost
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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
Title IDOR in board file download allows any user to download any file by UUID
Weaknesses CWE-639
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Sep 19, 2025, 7:52 PM
Reserved
Aug 15, 2025, 3:45 PM
Status
Analyzed
Published
Sep 19, 2025, 8:15 PM
Modified
Oct 19, 2026, 4:10 PM