CVE-2023-6459: Exposure of Sensitive Information to an Unauthorized Actor

December 6, 2023 (updated December 8, 2023)

Mattermost is grouping calls in the /metrics endpoint by id and reports that id in the response. Since this id is the channelID, the public /metrics endpoint is revealing channelIDs.

References

github.com/advisories/GHSA-63cv-4pc2-4fcf
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2023-6459

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