CVE-2025-27571

Channel metadata visible in archived channels despite configuration setting

Published Apr 16, 2025 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to check the "Allow Users to View Archived Channels" configuration when fetching channel metadata of a post from archived channels, which allows authenticated users to access such information when a channel is archived.

Remediation

Vendor Solution

Update Mattermost to versions 10.6.0, 10.5.2, 10.4.4, 9.11.10 or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-11358 Mattermost Incorrect Authorization vulnerability
Github GHSA Github GHSA GHSA-h4rr-f37j-4hh7 Mattermost Incorrect Authorization vulnerability
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
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 <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to check the "Allow Users to View Archived Channels" configuration when fetching channel metadata of a post from archived channels, which allows authenticated users to access such information when a channel is archived.
Title Channel metadata visible in archived channels despite configuration setting
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Apr 16, 2025, 2:34 PM
Reserved
Apr 8, 2025, 7:50 AM
Status
Analyzed
Published
Apr 16, 2025, 8:15 AM
Modified
Jun 17, 2026, 9:03 AM