Vulnerability Details CVE-2025-31363
Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.9 fail to restrict domains the LLM can request to contact upstream which allows an authenticated user to exfiltrate data from an arbitrary server accessible to the victim via performing a prompt injection in the AI plugin's Jira tool.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 5.9%
CVSS Severity
CVSS v3 Score 3.0
References
Products affected by CVE-2025-31363
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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:10.5.0
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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