CVE-2026-44783: Improper Access Control

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, a flaw in how replies to whisper posts are handled allows authenticated users outside the groups configured in...

CVE-2025-49845: Exposure of Sensitive Information to an Unauthorized Actor

Discourse is an open-source discussion platform. The visibility of posts typed whisper is controlled via the whispersallowedgroups 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...

CVE-2024-31219: Exposure of Sensitive Information to an Unauthorized Actor

Discourse-reactions is a plugin that allows user to add their reactions to the post. When whispers are enabled on a site via whispersallowedgroups and reactions are made on whispers on public topics, the contents of the whisper and the reaction data are shown on the /u/:username/activity/reaction...