CVE-2023-48297: Discourse

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Discourse is a platform for community discussion. The message serializer uses the full list of expanded chat mentions (@all and @here) which can lead to a very long array of users. This issue was patched in versions 3.1.4 and beta 3.2.0.beta5.

Affected products

• Discourse Discourse: before 3.1.4 (fixed in 3.1.4); version 3.2.0 only

Published 2024-01-12. Last modified 2026-06-17.