CVE-2022-36057: Discourse-Chat Cross-Site Scripting issue for channel names and descriptions

Severity: medium (CVSS 4.8 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: 2022-09-06 · updated 2026-06-17
Weakness: CWE-79

Description

Discourse-Chat is an asynchronous messaging plugin for the Discourse open-source discussion platform. Users of Discourse Chat can be affected by admin users inserting HTML into chat titles and descriptions, causing a Cross-Site Scripting (XSS) attack. Version 0.9 contains a patch for this issue.

Affected products

discourse-chat: before 0.9 — fixed in 0.9

How to fix

Upgrade to a fixed version: discourse-chat 0.9. Check the vendor advisory for mitigations.

References

https://github.com/discourse/discourse-chat/pull/1205
https://github.com/discourse/discourse-chat/security/advisories/GHSA-3vf2-wrjx-p6xj
https://github.com/discourse/discourse-chat/pull/1205
https://github.com/discourse/discourse-chat/security/advisories/GHSA-3vf2-wrjx-p6xj

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