CVE-2024-42406

Unauthorized access on archived channels

Published Sep 26, 2024 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Description
Mattermost versions 9.11.x <= 9.11.0, 9.10.x <= 9.10.1, 9.9.x <= 9.9.2 and 9.5.x <= 9.5.8 fail to properly authorize requests when viewing archived channels is disabled, which allows an attacker to retrieve post and file information about archived channels. Examples are flagged or unread posts as well as files.

Remediation

Vendor Solution

Update Mattermost to versions 10.0.0, 9.11.1, 9.10.2, 9.9.3, 9.5.9 or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-39606 Mattermost versions 9.11.x <= 9.11.0, 9.10.x <= 9.10.1, 9.9.x <= 9.9.2 and 9.5.x <= 9.5.8 fail to properly authorize requests when viewing archived channels is disabled, which allows an attacker to retrieve post and file information about archived channels. Examples are flagged or unread posts as well as files.
References
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00073}

epss

{'score': 0.0008}

Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost Server
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
cpe:2.3:a:mattermost:mattermost_server:9.11.0:-:*:*:*:*:*:*
cpe:2.3:a:mattermost:mattermost_server:9.11.0:rc1:*:*:*:*:*:*
cpe:2.3:a:mattermost:mattermost_server:9.11.0:rc2:*:*:*:*:*:*
cpe:2.3:a:mattermost:mattermost_server:9.11.0:rc3:*:*:*:*:*:*
Vendors & Products Mattermost
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 9.11.x <= 9.11.0, 9.10.x <= 9.10.1, 9.9.x <= 9.9.2 and 9.5.x <= 9.5.8 fail to properly authorize requests when viewing archived channels is disabled, which allows an attacker to retrieve post and file information about archived channels. Examples are flagged or unread posts as well as files.
Title Unauthorized access on archived channels
Weaknesses CWE-284
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Sep 26, 2024, 1:11 PM
Reserved
Sep 23, 2024, 7:55 AM
Status
Analyzed
Published
Sep 26, 2024, 8:15 AM
Modified
Jun 17, 2026, 7:49 AM