drupal 8.9.20

Maintenance and security release of the Drupal 9 series.

This release fixes security vulnerabilities. Sites are urged to update immediately after reading the notes below and the security announcement:

• Drupal core - Critical - Third-party library - SA-CORE-2021-011

No other fixes are included.

Which release do I choose? Security coverage information

• Sites on 8.9.x should update immediately to this release, and upgrade to Drupal 9 as soon as possible afterward because Drupal 8 is now end-of-life and no further Drupal 8 updates will be provided.
• Versions of Drupal prior to 9.1.x are end-of-life and do not receive security coverage.

Important update information

• CKEditor 4 has been updated to 4.17.1.
• No changes have been made to the .htaccess, web.config, robots.txt, or default settings.php files in this release, so updating custom versions of those files is not necessary if your site is already on the previous release.