Vulnerability Details CVE-2025-4128
Mattermost versions 10.5.x <= 10.5.4, 9.11.x <= 9.11.13 fail to properly restrict API access to team information, allowing guest users to bypass permissions and view information about public teams they are not members of via a direct API call to /api/v4/teams/{team_id}.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 6.0%
CVSS Severity
CVSS v3 Score 3.1
References
Products affected by CVE-2025-4128
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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:10.5.2
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cpe:2.3:a:mattermost:mattermost_server:10.5.3
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cpe:2.3:a:mattermost:mattermost_server:10.5.4
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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:9.11.10
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cpe:2.3:a:mattermost:mattermost_server:9.11.11
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cpe:2.3:a:mattermost:mattermost_server:9.11.12
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cpe:2.3:a:mattermost:mattermost_server:9.11.13
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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