Title: Version 5.5.1
Author: Jb Audras
Published: September 1, 2020

---

# Version 5.5.1

## In this article

 * [Installation/Update Information](https://wordpress.org/documentation/wordpress-version/version-5-5-1/?output_format=md#installation-update-information)
 * [Summary](https://wordpress.org/documentation/wordpress-version/version-5-5-1/?output_format=md#summary)
    - [Maintenance updates](https://wordpress.org/documentation/wordpress-version/version-5-5-1/?output_format=md#maintenance-updates)
 * [Notes for developers](https://wordpress.org/documentation/wordpress-version/version-5-5-1/?output_format=md#notes-for-developers)
 * [List of Files Revised](https://wordpress.org/documentation/wordpress-version/version-5-5-1/?output_format=md#list-of-files-revised)
 * [Updated packages](https://wordpress.org/documentation/wordpress-version/version-5-5-1/?output_format=md#updated-packages)

[ Back to top](https://wordpress.org/documentation/wordpress-version/version-5-5-1/?output_format=md#wp--skip-link--target)

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

## 󠀁[Installation/Update Information](https://wordpress.org/documentation/wordpress-version/version-5-5-1/?output_format=md#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](https://wordpress.org/download/release-archive/).

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

 * [Updating WordPress](https://wordpress.org/documentation/article/updating-wordpress/)

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

 * [New To WordPress – Where to Start](https://wordpress.org/documentation/article/new_to_wordpress_-_where_to_start/)
 * [First Steps With WordPress](https://wordpress.org/documentation/article/first-steps-with-wordpress/)
   or [Upgrading WordPress Extended](https://wordpress.org/documentation/article/upgrading-wordpress-extended-instructions/)
 * [WordPress Lessons](https://wordpress.org/documentation/article/wordpress-lessons/)

## 󠀁[Summary](https://wordpress.org/documentation/wordpress-version/version-5-5-1/?output_format=md#summary)󠁿

### 󠀁[Maintenance updates](https://wordpress.org/documentation/wordpress-version/version-5-5-1/?output_format=md#maintenance-updates)󠁿

WordPress 5.5.1 features [34 bug fixes and 4 enhancements](https://core.trac.wordpress.org/query?status=closed&milestone=5.5.1&group=status&col=id&col=summary&col=milestone&col=owner&col=type&col=status&col=priority&order=priority),
as well as [5 bug fixes](https://github.com/WordPress/gutenberg/pull/24828) for 
the block editor.

WordPress Core changes on Trac:

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

Block editor changes from GitHub:

 * [PR24609](https://github.com/WordPress/gutenberg/pull/24609) – Fix missing selected
   block highlighting in list view
 * [PR24599](https://github.com/WordPress/gutenberg/pull/24599) – Fix specificity
   for buttons with outline style and background colors
 * [PR24533](https://github.com/WordPress/gutenberg/pull/24533) – Fix incorrect 
   aria description in List View
 * [PR24516](https://github.com/WordPress/gutenberg/pull/24516) – Fix regression
   bug for category select in QueryControls component
 * [PR24478](https://github.com/WordPress/gutenberg/pull/24478) – 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](https://profiles.wordpress.org/wpamitkumar/), [Andrea Fercia](https://profiles.wordpress.org/afercia/),
[Andrey “Rarst” Savchenko](https://profiles.wordpress.org/rarst/), [Andy Fragen](https://profiles.wordpress.org/afragen/),
[Angel Hess](https://profiles.wordpress.org/akissz/), [avixansa](https://profiles.wordpress.org/avixansa/),
[bobbingwide](https://profiles.wordpress.org/bobbingwide/), [Brian Hogg](https://profiles.wordpress.org/brianhogg/),
[chunkysteveo](https://profiles.wordpress.org/chunkysteveo/), [Clayton Collie](https://profiles.wordpress.org/claytoncollie/),
[David Baumwald](https://profiles.wordpress.org/davidbaumwald/), [David Herrera](https://profiles.wordpress.org/dlh/),
[dd32](https://profiles.wordpress.org/dd32/), [demetris](https://profiles.wordpress.org/demetris/),
[Dominik Schilling](https://profiles.wordpress.org/ocean90/), [dushakov](https://profiles.wordpress.org/dushakov/),
[Earle Davies](https://profiles.wordpress.org/elrae/), [Enrique Sánchez](https://profiles.wordpress.org/nrqsnchz/),
[Frankie Jarrett](https://profiles.wordpress.org/fjarrett/), [fullofcaffeine](https://profiles.wordpress.org/fullofcaffeine/),
[Garrett Hyder](https://profiles.wordpress.org/garrett-eclipse/), [Gary Jones](https://profiles.wordpress.org/garyj/),
[gchtr](https://profiles.wordpress.org/gchtr/), [Herre Groen](https://profiles.wordpress.org/herregroen/),
[Howdy_McGee](https://profiles.wordpress.org/howdy_mcgee/), [Ipstenu (Mika Epstein)](https://profiles.wordpress.org/ipstenu/),
[Jb Audras](https://profiles.wordpress.org/audrasjb/), [Jeremy Felt](https://profiles.wordpress.org/jeremyfelt/),
[Jeroen Rotty](https://profiles.wordpress.org/jeroenrotty/), [Joen A.](https://profiles.wordpress.org/joen/),
[Johanna de Vos](https://profiles.wordpress.org/johannadevos/), [John Blackbourn](https://profiles.wordpress.org/johnbillion/),
[John James Jacoby](https://profiles.wordpress.org/johnjamesjacoby/), [Jonathan Bossenger](https://profiles.wordpress.org/psykro/),
[Jonathan Desrosiers](https://profiles.wordpress.org/desrosj/), [Jonathan Stegall](https://profiles.wordpress.org/jonathanstegall/),
[Joost de Valk](https://profiles.wordpress.org/joostdevalk/), [Jorge Costa](https://profiles.wordpress.org/jorgefilipecosta/),
[Justin Ahinon](https://profiles.wordpress.org/justinahinon/), [Kalpesh Akabari](https://profiles.wordpress.org/akabarikalpesh/),
[Kevin Hagerty](https://profiles.wordpress.org/khag7/), [Knut Sparhell](https://profiles.wordpress.org/knutsp/),
[Kyle B. Johnson](https://profiles.wordpress.org/kbjohnson90/), [landau](https://profiles.wordpress.org/landau/),
[Laxman Prajapati](https://profiles.wordpress.org/laxman-prajapati/), [Lester Chan](https://profiles.wordpress.org/gamerz/),
[mailnew2ster](https://profiles.wordpress.org/mailnew2ster/), [Marius L. J.](https://profiles.wordpress.org/clorith/),
[Mark Jaquith](https://profiles.wordpress.org/markjaquith/), [Mark Uraine](https://profiles.wordpress.org/mapk/),
[Matt Gibson](https://profiles.wordpress.org/gothickgothickorguk/), [Michael Beckwith](https://profiles.wordpress.org/tw2113/),
[Mikey Arce](https://profiles.wordpress.org/mikeyarce/), [Mohammad Jangda](https://profiles.wordpress.org/batmoo/),
[Mukesh Panchal](https://profiles.wordpress.org/mukesh27/), [Nabil Moqbel](https://profiles.wordpress.org/nabilmoqbel/),
[net](https://profiles.wordpress.org/krstarica/), [oakesjosh](https://profiles.wordpress.org/oakesjosh/),
[O André](https://profiles.wordpress.org/nosolosw/), [Omar Reiss](https://profiles.wordpress.org/omarreiss/),
[Ov3rfly](https://profiles.wordpress.org/ov3rfly/), [Paddy](https://profiles.wordpress.org/paddy/),
[Pascal Casier](https://profiles.wordpress.org/casiepa/), [Paul Biron](https://profiles.wordpress.org/pbiron/),
[Peter Wilson](https://profiles.wordpress.org/peterwilsoncc/), [rajeshsingh520](https://profiles.wordpress.org/rajeshsingh520/),
[Rami Yushuvaev](https://profiles.wordpress.org/ramiy/), [rebasaurus](https://profiles.wordpress.org/rebasaurus/),
[riaanlom](https://profiles.wordpress.org/riaanlom/), [Riad Benguella](https://profiles.wordpress.org/youknowriad/),
[Rodrigo Arias](https://profiles.wordpress.org/kreppar/), [rtagliento](https://profiles.wordpress.org/rtagliento/),
[salvoaranzulla](https://profiles.wordpress.org/salvoaranzulla/), [Sanjeev Aryal](https://profiles.wordpress.org/sanzeeb3/),
[sarahricker](https://profiles.wordpress.org/sarahricker/), [Sergey Biryukov](https://profiles.wordpress.org/sergeybiryukov/),
[Stephen Bernhardt](https://profiles.wordpress.org/sabernhardt/), [Steven Stern (sterndata)](https://profiles.wordpress.org/sterndata/),
[Thomas M](https://profiles.wordpress.org/webzunft/), [Timothy Jacobs](https://profiles.wordpress.org/timothyblynjacobs/),
[TobiasBg](https://profiles.wordpress.org/tobiasbg/), [tobifjellner (Tor-Bjorn Fjellner)](https://profiles.wordpress.org/tobifjellner/),
[TwentyZeroTwo](https://profiles.wordpress.org/twentyzerotwo/), [wittich](https://profiles.wordpress.org/wittich/),
and [Yoav Farhi](https://profiles.wordpress.org/yoavf/).

For more information, [browse the full list of changes on Trac](https://core.trac.wordpress.org/query?status=closed&milestone=5.5.1&group=status&col=id&col=summary&col=status&col=milestone&col=owner&col=type&col=priority&col=component&col=focuses&col=keywords&order=priority).

## 󠀁[Notes for developers](https://wordpress.org/documentation/wordpress-version/version-5-5-1/?output_format=md#notes-for-developers)󠁿

> [WordPress environment types](https://make.wordpress.org/core/2020/08/27/wordpress-environment-types/)

> [Deprecated JavaScript globals](https://make.wordpress.org/core/2020/09/01/deprecated-javascript-globals/)

## 󠀁[List of Files Revised](https://wordpress.org/documentation/wordpress-version/version-5-5-1/?output_format=md#list-of-files-revised)󠁿

    ```wp-block-preformatted
    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
    ```

## 󠀁[Updated packages](https://wordpress.org/documentation/wordpress-version/version-5-5-1/?output_format=md#updated-packages)󠁿

    ```wp-block-preformatted
    No package was updated.
    ```

First published

September 1, 2020

Last updated