Discourse · Discourse · CVE-2021-43850
**Name of the Vulnerable Software and Affected Versions**
Discourse versions prior to 2.8.0.beta10
Discourse versions prior to 2.7.12
**Description**
The issue affects Discourse, an open source platform for community discussion, where admin users can trigger a Denial of Service attack via the "/message-bus/ diagnostics" API endpoint. This vulnerability has a greater impact on multisite Discourse instances, where any admin user on any of the forums can visit the "/message-bus/ diagnostics" path.
**Recommendations**
For versions prior to 2.8.0.beta10, upgrade to 2.8.0.beta10 or later.
For versions prior to 2.7.12, upgrade to 2.7.12 or later.