CVE-2024-39320: Discourse

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Discourse is an open source discussion platform. Prior to 3.2.5 and 3.3.0.beta5, the vulnerability allows an attacker to inject iframes from any domain, bypassing the intended restrictions enforced by the allowed_iframes setting. This vulnerability is fixed in 3.2.5 and 3.3.0.beta5.

Affected products

• Discourse Discourse: before 3.2.5 (fixed in 3.2.5); version 3.3.0 only

Published 2024-07-30. Last modified 2026-06-17.