What’s Vulnerable › Vulnerabilities
CVE-2023-6459: Public endpoint /metrics of Calls plugin reveals channel IDs
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2023-12-06 · updated 2026-06-17
- Weakness: CWE-200
Description
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.
Affected products
- Mattermost: before 7.8.14; from 8.0.0 before 8.1.5 — fixed in 7.8.14, 8.1.5
How to fix
Upgrade to a fixed version: Mattermost 7.8.14, 8.1.5. Check the vendor advisory for mitigations.
References
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