Vulnerability Details CVE-2025-27571
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 11.3%
CVSS Severity
CVSS v3 Score 4.3
References
Products affected by CVE-2025-27571
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cpe:2.3:a:mattermost:mattermost_server:10.4.0
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cpe:2.3:a:mattermost:mattermost_server:10.4.1
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cpe:2.3:a:mattermost:mattermost_server:10.4.2
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cpe:2.3:a:mattermost:mattermost_server:10.4.3
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cpe:2.3:a:mattermost:mattermost_server:10.5.0
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cpe:2.3:a:mattermost:mattermost_server:10.5.1
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cpe:2.3:a:mattermost:mattermost_server:9.11.0
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cpe:2.3:a:mattermost:mattermost_server:9.11.1
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cpe:2.3:a:mattermost:mattermost_server:9.11.2
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cpe:2.3:a:mattermost:mattermost_server:9.11.3
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cpe:2.3:a:mattermost:mattermost_server:9.11.4
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cpe:2.3:a:mattermost:mattermost_server:9.11.5
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cpe:2.3:a:mattermost:mattermost_server:9.11.6
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cpe:2.3:a:mattermost:mattermost_server:9.11.7
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cpe:2.3:a:mattermost:mattermost_server:9.11.8
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cpe:2.3:a:mattermost:mattermost_server:9.11.9