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This security and maintenance release features 5 bug fixes on Core, 16 bug fixes for the Block Editor, and 2 security fixes.
Because this is a security release, it is recommended that you update your sites immediately. Backports are also available for other major WordPress releases, 4.1 and later.
You can download WordPress 6.4.3 from WordPress.org, or visit your WordPress Dashboard, click “Updates”, and then click “Update Now”. If you have sites that support automatic background updates, the update process will begin automatically.