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CVE-2023-6459

5.3 mediumEPSS 0.5%

Medium (5.3) in mattermost mattermost server. EPSS 0.5% chance of exploitation in the next 30 days. Fixed in github.com/mattermost/mattermost-server/v6 7.8.14.

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.

Severity

CVSS 3.1

5.3 medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS
0.5% chance of exploitation in the next 30 days; higher than 45% of CVEs (scores of 2026-10-31)
CWE
CWE-200
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-63cv-4pc2-4fcfGogithub.com/mattermost/mattermost-server/v6<7.8.147.8.14
GHSA-63cv-4pc2-4fcfGogithub.com/mattermost/mattermost/server/v8<8.1.58.1.5

References

Check your stackJSON