CVE-2023-36466: Discourse

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Discourse is an open source discussion platform. When editing a topic, there is a vulnerability that enables a user to bypass the topic title validations for things like title length, number of emojis in title and blank topic titles. The issue is patched in the latest stable, beta and tests-passed version of Discourse.

Affected products

• Discourse Discourse: before 3.0.5 (fixed in 3.0.5); 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 2023-07-14. Last modified 2026-06-17.