Title: Version 4.7.21
Author: Jb Audras
Published: May 13, 2021

---

# Version 4.7.21

## In this article

 * [Installation/Update Information](https://wordpress.org/documentation/wordpress-version/version-4-7-21/?output_format=md#installation-update-information)
 * [Summary](https://wordpress.org/documentation/wordpress-version/version-4-7-21/?output_format=md#summary)
    - [Security updates](https://wordpress.org/documentation/wordpress-version/version-4-7-21/?output_format=md#security-updates)
 * [List of Files Revised](https://wordpress.org/documentation/wordpress-version/version-4-7-21/?output_format=md#list-of-files-revised)
 * [Updated packages](https://wordpress.org/documentation/wordpress-version/version-4-7-21/?output_format=md#updated-packages)

[ Back to top](https://wordpress.org/documentation/wordpress-version/version-4-7-21/?output_format=md#wp--skip-link--target)

On May 12, 2021, WordPress 4.7.21 was released to the public.

## 󠀁[Installation/Update Information](https://wordpress.org/documentation/wordpress-version/version-4-7-21/?output_format=md#installation-update-information)󠁿

To get this version, update automatically from the Dashboard > Updates menu in your
site’s admin area or visit [https://wordpress.org/download/release-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/support/article/new_to_wordpress_-_where_to_start/?output_format=md)
 *  [First Steps With WordPress](https://wordpress.org/support/article/first-steps-with-wordpress/?output_format=md)
   or [Upgrading WordPress Extended](https://wordpress.org/documentation/article/upgrading-wordpress-extended-instructions/)
 * [WordPress Lessons](https://wordpress.org/support/article/wordpress-lessons/?output_format=md)

## 󠀁[Summary](https://wordpress.org/documentation/wordpress-version/version-4-7-21/?output_format=md#summary)󠁿

### 󠀁[Security updates](https://wordpress.org/documentation/wordpress-version/version-4-7-21/?output_format=md#security-updates)󠁿

One security issue affects WordPress versions between 3.7 and 5.7. If you haven’t
yet updated to 5.7, all WordPress versions since 3.7 have also been updated to fix
the following security issues:

 * Object injection in PHPMailer, [CVE-2020-36326](https://nvd.nist.gov/vuln/detail/CVE-2020-36326)
   and [CVE-2018-19296](https://nvd.nist.gov/vuln/detail/CVE-2018-19296).

This version of WordPress was led by [@peterwilsoncc](https://profiles.wordpress.org/peterwilsoncc/)
and [@audrasjb](https://profiles.wordpress.org/audrasjb/).

Props to [@audrasjb](https://profiles.wordpress.org/audrasjb/), [@ayeshrajans](https://profiles.wordpress.org/ayeshrajans/),
[@desrosj](https://profiles.wordpress.org/desrosj/), [@peterwilsoncc](https://profiles.wordpress.org/peterwilsoncc/),
[@SergeyBiryukov](https://profiles.wordpress.org/SergeyBiryukov/) and [@xknown](https://profiles.wordpress.org/xknown/)
for their work on the security issue.

For more information, [browse the full list of changes on Trac](https://core.trac.wordpress.org/query?status=closed&resolution=fixed&milestone=5.7.2&order=priority).

## 󠀁[List of Files Revised](https://wordpress.org/documentation/wordpress-version/version-4-7-21/?output_format=md#list-of-files-revised)󠁿

    ```wp-block-preformatted
    wp-admin/about.php
    wp-includes/class-phpmailer.php
    ```

## 󠀁[Updated packages](https://wordpress.org/documentation/wordpress-version/version-4-7-21/?output_format=md#updated-packages)󠁿

No package was updated.

First published

May 13, 2021

Last updated