Version 5.5.1

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On September 1, 2020, WordPress 5.5.1 was released to the public.

Installation/Update Information Installation/Update Information

To download WordPress 5.5.1, update automatically from the Dashboard > Updates menu in your site’s admin area or visit WordPress releases archive.

For step-by-step instructions on installing and updating WordPress:

If you are new to WordPress, we recommend that you begin with the following:

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Summary Summary

Maintenance updates Maintenance updates

WordPress 5.5.1 features 34 bug fixes and 4 enhancements, as well as 5 bug fixes for the block editor.

WordPress Core changes on Trac:

  • #50882 – Administration: WP 5.5: Cannot attribute content when deleting users
  • #50998 – Quick/Bulk Edit: Editing posts using bottom “Bulk actions” dropdown menu doesn’t work
  • #38009 – Comments: #reply-title.comment-reply-title not updating when replying to an individual
  • #50845 – Editor: Block patterns: Fix translatable strings (take 2)
  • #50858 – Site Health: Check PHP notices with site_status_tests filter
  • #50887 – Site Health: Add site environment to debug information
  • #50892 – Editor: Some block patterns have text contrast issues with dark themes
  • #50910 – Sitemaps: 5.5 Sitemap URLs are incorrectly paginated
  • #50912 – Site Health: flags define WP_AUTO_UPDATE_CORE value as an error
  • #50919 – Script Loader: Change the jquery handle back to an alias for jquery-core
  • #50933 – Media: Lazy loading in 5.5 causes flashing of custom logo in Firefox
  • #50945 – Site Health: don’t give a warning when upload_max_size is lower than max_post_size
  • #50988 – Upgrade/Install: Pass details about the specific plugin and theme updates attempted to filters
  • #50992 – Bootstrap/Load: Remove the ability to alter the list of environment types in wp_get_environment_type()
  • #50999 – Script Loader: Disable concatenation for scripts with translations to ensure they are printed in the right order
  • #51011 – Upgrade/Install: Empty string comparison on home option during DB upgrades is invalid
  • #51018 – Editor: PHP Notice thrown when searching for certain terms via the Gutenberg block directory
  • #51151 – Editor: Packages update
  • #51021 – REST API: Permit uniqueItems keyword in endpoint args
  • #51146 – REST API: Fix multi-type schemas with integer fields
  • #51029 – Filesystem API: Typo in variable name causes warning from fclose()
  • #51042 – Post: missing excerpt
  • #51050 – Docs: Add docblock for get_the_archive_title() filter
  • #51052 – Administration: Undefined index: update-supported
  • #51060 – Docs: Update register_rest_route docblock to reflect additions since 5.5
  • #51064 – Bootstrap/Load: Consider adding “local” as environment on WP_ENVIRONMENT_TYPE
  • #51073 – Administration: Extra padding below the admin bar
  • #51075 – Docs: Update docs for custom logo functions
  • #51122 – Docs: add a mention about the use of loading attribute in wp_get_attachment_image function
  • #51127 – UI/CSS: Remove non-color related styling from Modern color scheme
  • #51129 – Upgrade/Install: Only display the auto-update links on the Network Admin > Themes screen for themes that support the feature
  • #51337 – Template: wp_terms_checklist not checking selected taxonomy items with selected_cats option
  • #51184 – get_the_date() checks $format only for empty variable and fails on false boolean
  • #51182 – Theme_Installer_skin::do_overwrite does not work on a Windows server
  • #38009 – #reply-title.comment-reply-title not updating when replying to an individual
  • #51123 – commonL10n and other JS globals removed without backwards compatibility
  • #50848 – Clarify the usage of null for auto_update_{$type} filter
  • #51081 – Fatal Error – Undefined get_page_templates() in Customizer
  • #51154 – sitemaps should be initialized before each test is run
  • #51028 – Dot should be out of the quotes

Block editor changes from GitHub:

  • PR24609 – Fix missing selected block highlighting in list view
  • PR24599 – Fix specificity for buttons with outline style and background colors
  • PR24533 – Fix incorrect aria description in List View
  • PR24516 – Fix regression bug for category select in QueryControls component
  • PR24478 – Fix tiny editor preview when using Mobile or Tablet options with metaboxes enabled

The 5.5.1 release was led by @audrasjb, @azhiyadev, @davidbaumwald, @desrosj, @johnbillion, @planningwrite, @sergeybiryukov and @whyisjake.

Thank you to everyone who helped make WordPress 5.5.1 happen:

Amit Dudhat, Andrea Fercia, Andrey “Rarst” Savchenko, Andy Fragen, Angel Hess, avixansa, bobbingwide, Brian Hogg, chunkysteveo, Clayton Collie, David Baumwald, David Herrera, dd32, demetris, Dominik Schilling, dushakov, Earle Davies, Enrique Sánchez, Frankie Jarrett, fullofcaffeine, Garrett Hyder, Gary Jones, gchtr, Herre Groen, Howdy_McGee, Ipstenu (Mika Epstein), Jb Audras, Jeremy Felt, Jeroen Rotty, Joen A., Johanna de Vos, John Blackbourn, John James Jacoby, Jonathan Bossenger, Jonathan Desrosiers, Jonathan Stegall, Joost de Valk, Jorge Costa, Justin Ahinon, Kalpesh Akabari, Kevin Hagerty, Knut Sparhell, Kyle B. Johnson, landau, Laxman Prajapati, Lester Chan, mailnew2ster, Marius L. J., Mark Jaquith, Mark Uraine, Matt Gibson, Michael Beckwith, Mikey Arce, Mohammad Jangda, Mukesh Panchal, Nabil Moqbel, net, oakesjosh, O André, Omar Reiss, Ov3rfly, Paddy, Pascal Casier, Paul Biron, Peter Wilson, rajeshsingh520, Rami Yushuvaev, rebasaurus, riaanlom, Riad Benguella, Rodrigo Arias, rtagliento, salvoaranzulla, Sanjeev Aryal, sarahricker, Sergey Biryukov, Stephen Bernhardt, Steven Stern (sterndata), Thomas M, Timothy Jacobs, TobiasBg, tobifjellner (Tor-Bjorn Fjellner), TwentyZeroTwo, wittich, and Yoav Farhi.

For more information, browse the full list of changes on Trac.

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Notes for developers Notes for developers

WordPress environment types
Deprecated JavaScript globals

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List of Files Revised List of Files Revised

wp-admin/admin-header.php
wp-admin/css/colors/modern/colors-rtl.css
wp-admin/css/colors/modern/colors-rtl.min.css
wp-admin/css/colors/modern/colors.css
wp-admin/css/colors/modern/colors.min.css
wp-admin/css/colors/modern/colors.scss
wp-admin/includes/class-theme-installer-skin.php
wp-admin/includes/class-walker-category-checklist.php
wp-admin/includes/class-wp-automatic-updater.php
wp-admin/includes/class-wp-debug-data.php
wp-admin/includes/class-wp-filesystem-ftpext.php
wp-admin/includes/class-wp-list-table.php
wp-admin/includes/class-wp-ms-themes-list-table.php
wp-admin/includes/class-wp-plugins-list-table.php
wp-admin/includes/class-wp-site-health-auto-updates.php
wp-admin/includes/class-wp-site-health.php
wp-admin/includes/template.php
wp-admin/includes/upgrade.php
wp-admin/js/common.js
wp-admin/js/common.min.js
wp-admin/js/theme-plugin-editor.js
wp-admin/js/theme-plugin-editor.min.js
wp-admin/js/updates.js
wp-admin/js/updates.min.js
wp-admin/js/widgets.js
wp-admin/js/widgets.min.js
wp-includes/assets/script-loader-packages.php
wp-includes/block-patterns/heading-paragraph.php
wp-includes/block-patterns/large-header-button.php
wp-includes/block-patterns/text-three-columns-buttons.php
wp-includes/block-patterns/text-two-columns-with-images.php
wp-includes/block-patterns/text-two-columns.php
wp-includes/canonical.php
wp-includes/class.wp-scripts.php
wp-includes/comment-template.php
wp-includes/css/dist/block-editor/style-rtl.css
wp-includes/css/dist/block-editor/style-rtl.min.css
wp-includes/css/dist/block-editor/style.css
wp-includes/css/dist/block-editor/style.min.css
wp-includes/css/dist/block-library/style-rtl.css
wp-includes/css/dist/block-library/style-rtl.min.css
wp-includes/css/dist/block-library/style.css
wp-includes/css/dist/block-library/style.min.css
wp-includes/formatting.php
wp-includes/general-template.php
wp-includes/js/comment-reply.js
wp-includes/js/comment-reply.min.js
wp-includes/js/dist/block-editor.js
wp-includes/js/dist/block-editor.min.js
wp-includes/js/dist/components.js
wp-includes/js/dist/components.min.js
wp-includes/load.php
wp-includes/media.php
wp-includes/rest-api.php
wp-includes/rest-api/endpoints/class-wp-rest-block-directory-controller.php
wp-includes/rest-api/endpoints/class-wp-rest-controller.php
wp-includes/script-loader.php
wp-includes/sitemaps.php
wp-includes/version.php

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