Security Advisory

CVE-2026-27153

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-02-26 21:16:41

Last updated 2026-03-02 20:56:14

Assigner GitHub_M

State PUBLISHED

Description

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, moderators could export user Chat DMs via the CSV export endpoint by exploiting an overly permissive allowlist in `can_export_entity?`. The method allowed moderators to export any entity not explicitly blocked instead of restricting to an explicit allowlist. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.

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