bbPress 2.2.4 (now available for download) is a maintenance and security release, and a safe and easy update for all previous bbPress 2.x versions.
Version 2.2.4 includes some security hardening inside the Forum Importer/Converter tool, and improves post form output sanitization. These issues were responsibly disclosed by Maty Siman.
Download 2.2.4 now or visit Dashboard ? Updates in your site admin to update now.