Title: Version 3.1.1
Published: May 19, 2019

---

# Version 3.1.1

## In this article

 * [Installation/Upgrade Information](https://wordpress.org/documentation/wordpress-version/version-3-1-1/?output_format=md#installation-upgrade-information)
 * [Summary](https://wordpress.org/documentation/wordpress-version/version-3-1-1/?output_format=md#summary)
 * [List of Files Revised](https://wordpress.org/documentation/wordpress-version/version-3-1-1/?output_format=md#list-of-files-revised)

[ Back to top](https://wordpress.org/documentation/wordpress-version/version-3-1-1/?output_format=md#wp--skip-link--target)

On April 5, 2011, WordPress 3.1.1 was released to the public. This is a maintenance
release with additional security fixes for all previous WordPress versions.

For version 3.1.1, the database version (**db_version** in **wp_options**) changed
to 17516.

## 󠀁[Installation/Upgrade Information](https://wordpress.org/documentation/wordpress-version/version-3-1-1/?output_format=md#installation-upgrade-information)󠁿

To download WordPress 3.1.1, 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/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-3-1-1/?output_format=md#summary)󠁿

 * Security hardening to media uploads ([r17569](https://core.trac.wordpress.org/changeset/17569))
 * Prevent potential PHP crashes caused by complex hyperlinks ([#16892](https://core.trac.wordpress.org/ticket/16892))
 * Correct minor XSS flaw on database upgrade screens ([r17583](https://core.trac.wordpress.org/changeset/17583))
 * Fixed 26 tickets. A breakdown of bug fixes by component can be found on [Trac](https://core.trac.wordpress.org/milestone/3.1.1).

## 󠀁[List of Files Revised](https://wordpress.org/documentation/wordpress-version/version-3-1-1/?output_format=md#list-of-files-revised)󠁿

    ```wp-block-preformatted
    wp-includes/admin-bar.php
    wp-includes/taxonomy.php
    wp-includes/post.php
    wp-includes/version.php
    wp-includes/js/tinymce/tiny_mce.js
    wp-includes/js/tinymce/wp-tinymce.js.gz
    wp-includes/functions.php
    wp-includes/query.php
    wp-includes/link-template.php
    wp-includes/wp-db.php
    wp-includes/formatting.php
    wp-includes/rewrite.php
    wp-includes/canonical.php
    wp-includes/css/admin-bar.css
    wp-includes/css/admin-bar.dev.css
    wp-includes/script-loader.php
    wp-includes/meta.php
    readme.html
    wp-admin/network.php
    wp-admin/includes/class-wp-ms-sites-list-table.php
    wp-admin/includes/dashboard.php
    wp-admin/includes/class-wp-upgrader.php
    wp-admin/includes/update-core.php
    wp-admin/includes/media.php
    wp-admin/media-upload.php
    wp-admin/network/settings.php
    wp-admin/network/admin.php
    wp-admin/upgrade.php
    wp-admin/user/admin.php
    ```

First published

May 19, 2019

Last updated