CVE-2023-37906: Discourse

Medium severity, CVSS 4.3. EPSS: 0.5% chance of exploitation in the next 30 days.

Discourse is an open source discussion platform. Prior to version 3.0.6 of the `stable` branch and version 3.1.0.beta7 of the `beta` and `tests-passed` branches, a malicious user can edit a post in a topic and cause a DoS with a carefully crafted edit reason. The issue is patched in version 3.0.6 of the `stable` branch and version 3.1.0.beta7 of the `beta` and `tests-passed` branches. There are no known workarounds for this vulnerability.

Affected products

• Discourse Discourse: before 3.0.6 (fixed in 3.0.6); version 1.1.0 only; version 1.2.0 only; version 1.3.0 only; version 1.4.0 only; version 1.5.0 only; …

Published 2023-07-28. Last modified 2026-06-17.