CVE-2025-41436

Unauthorized access to archived channel content via threads interface

Published Nov 14, 2025 CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed
Description
Mattermost versions <11.0 fail to properly enforce the "Allow users to view archived channels" setting which allows regular users to access archived channel content and files via the "Open in Channel" functionality from followed threads

Remediation

Vendor Solution

Update Mattermost to versions 11.0.0 or higher.

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-x3hx-ch7p-8xgg Mattermost allows regular users to access archived channel content and 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 <11.0 fail to properly enforce the "Allow users to view archived channels" setting which allows regular users to access archived channel content and files via the "Open in Channel" functionality from followed threads
Title Unauthorized access to archived channel content via threads interface
Weaknesses CWE-863
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
Nov 14, 2025, 3:48 PM
Reserved
Oct 15, 2025, 11:16 AM
Status
Analyzed
Published
Nov 14, 2025, 8:15 AM
Modified
Oct 19, 2026, 1:10 PM