5.0.3 is a maintenance release that includes 37 bug fixes and 7 performance updates. The focus of this release was fine-tuning the new block editor, and fixing any major bugs or regressions.
Here are a few of the highlights:
- 15 block editor related bug fixes and improvements have been added to bundled themes. Make sure to update these for an improved block editing experience.
- 2 block editor related internationalization (I18N) bugs have been fixed
- A few PHP errors in the Customizer have been fixed.
- Some issues uploading common file types, like CSVs, have been fixed.
You can download WordPress 5.0.3 or visit Dashboard → Updates on your site and click Update Now. Sites that support automatic background updates have already started to update automatically.