CVE-2025-49845: Discourse

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Discourse is an open-source discussion platform. The visibility of posts typed `whisper` is controlled via the `whispers_allowed_groups` site setting. Only users that belong to groups specified in the site setting are allowed to view posts typed `whisper`. However, it has been discovered that users of versions prior to 3.4.6 on the `stable` branch and prior to 3.5.0.beta8-dev on the `tests-passed` branch can continue to see their own whispers even after losing visibility of posts typed `whisper`. This issue is patched in versions 3.4.6 and 3.5.0.beta8-dev. No known workarounds are available.

Affected products

• Discourse Discourse: before 3.4.6 (fixed in 3.4.6)

Published 2025-06-25. Last modified 2026-06-17.