Mattermost versions 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate the user permission when accessing the files and subscribing to the block in Boards, which allows an authenticated user to access other board files and was able to subscribe to the block from other boards that the user does not have access to
References
History

Wed, 03 Dec 2025 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost mattermost Server
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Vendors & Products Mattermost mattermost Server

Wed, 03 Dec 2025 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost
Vendors & Products Mattermost
Mattermost mattermost

Tue, 02 Dec 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 02 Dec 2025 09:45:00 +0000

Type Values Removed Values Added
Description Mattermost versions 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate the user permission when accessing the files and subscribing to the block in Boards, which allows an authenticated user to access other board files and was able to subscribe to the block from other boards that the user does not have access to
Title Unauthorized access and subscription vulnerability in Boards
Weaknesses CWE-306
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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Mattermost

Published: 2025-12-02T09:28:44.436Z

Updated: 2025-12-02T14:38:23.000Z

Reserved: 2025-12-02T09:10:03.197Z

Link: CVE-2025-13870

cve-icon Vulnrichment

Updated: 2025-12-02T14:38:19.956Z

cve-icon NVD

Status : Analyzed

Published: 2025-12-02T10:16:01.270

Modified: 2025-12-03T20:57:20.907

Link: CVE-2025-13870

cve-icon Redhat

No data.