+
+- Welcome Chat messages preventing user registration with MRF Simple Policy applied to the local instance
+
+## [2.1.1] - 2020-09-08
+
+### Security
+- Fix possible DoS in Mastodon API user search due to an error in match clauses, leading to an infinite recursion and subsequent OOM with certain inputs.
+- Fix metadata leak for accounts and statuses on private instances.
+- Fix possible DoS in Admin API search using an atom leak vulnerability. Authentication with admin rights was required to exploit.
+
+### Changed
+
+- **Breaking:** The metadata providers RelMe and Feed are no longer configurable. RelMe should always be activated and Feed only provides a <link> header tag for the actual RSS/Atom feed when the instance is public.
+- Improved error message when cmake is not available at build stage.
+
+### Added
+- Rich media failure tracking (along with `:failure_backoff` option).
+
+### Fixed
+- Default HTTP adapter not respecting pool setting, leading to possible OOM.
+- Fixed uploading webp images when the Exiftool Upload Filter is enabled by skipping them