CVE-2022-23548: Discourse

Medium severity, CVSS 6.5. EPSS: 0.7% chance of exploitation in the next 30 days.

Discourse is an option source discussion platform. Prior to version 2.8.14 on the `stable` branch and version 2.9.0.beta16 on the `beta` and `tests-passed` branches, parsing posts can be susceptible to regular expression denial of service (ReDoS) attacks. This issue is patched in versions 2.8.14 and 2.9.0.beta16. There are no known workarounds.

Affected products

• Discourse Discourse: before 2.8.14 (fixed in 2.8.14); version 2.9.0 only; version 3.0.0 only

Published 2023-01-05. Last modified 2026-06-17.