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On January 24, 2013, WordPress 3.5.1 was released to the public. This is a maintenance and security update.

Installation/Update Information

To download WordPress 3.5.1, update automatically from the Dashboard > Updates menu in your site's admin area or visit http://wordpress.org/download/release-archive/.

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

• Updating WordPress

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

• New To WordPress - Where to Start
• First Steps With WordPress or Upgrading WordPress Extended
• WordPress Lessons

Windows Servers Running IIS

A bug affecting Windows servers running IIS can prevent updating from WordPress 3.5 to WordPress 3.5.1. If you receive the error "Destination directory for file streaming does not exist or is not writable," you have a few options:

• Option 1. Manually install the Hotfix plugin. Please see the Codex instructions for manual plugin installation.

• Option 2. Add the following to your `wp-config.php`. Remove it after updating to WordPress 3.5.

define( 'WP_TEMP_DIR', ABSPATH . 'wp-content/' );

If you need assistance, please try the WordPress Support Forums.

Summary

From the announcement post, this maintenance release addresses 37 bugs with version 3.5, including:

• Editor: Prevent certain HTML elements from being unexpectedly removed or modified in rare cases.
• Media: Fix a collection of minor workflow and compatibility issues in the new media manager.
• Networks: Suggest proper rewrite rules when creating a new network.
• Prevent scheduled posts from being stripped of certain HTML, such as video embeds, when they are published.
• Work around some misconfigurations that may have caused some JavaScript in the WordPress admin area to fail.
• Suppress some warnings that could occur when a plugin misused the database or user APIs.

Additionally: Version 3.5.1 fixes a few security issues:

• Server-side request forgery (SSRF) and remote port scanning via pingbacks. Fixed by the WordPress security team. CVE-2013-0235.
• Cross-site scripting (XSS) via shortcodes and post content. Discovered by Jon Cave of the WordPress security team. CVE-2013-0236.
• Cross-site scripting (XSS) in the external library Plupload. Plupload 1.5.5 was released to address this issue. CVE-2013-0237.

A full log of the changes made for 3.5.1 can be found at http://core.trac.wordpress.org/log/branches/3.5?rev=23341&stop_rev=23167.

List of Files Revised

wp-includes/default-filters.php
wp-includes/class-http.php
wp-includes/post.php
wp-includes/version.php
wp-includes/js/tinymce/tiny_mce.js
wp-includes/js/tinymce/wp-tinymce-schema.js
wp-includes/js/tinymce/wp-tinymce.js.gz
wp-includes/js/media-editor.js
wp-includes/js/plupload/plupload.silverlight.xap
wp-includes/js/plupload/plupload.html5.js
wp-includes/js/plupload/changelog.txt
wp-includes/js/plupload/plupload.silverlight.js
wp-includes/js/plupload/plupload.flash.swf
wp-includes/js/plupload/plupload.js
wp-includes/js/media-views.js
wp-includes/js/media-editor.min.js
wp-includes/js/media-views.min.js
wp-includes/comment.php
wp-includes/class-wp-embed.php
wp-includes/functions.php
wp-includes/template.php
wp-includes/user.php
wp-includes/media.php
wp-includes/class-wp-xmlrpc-server.php
wp-includes/wp-db.php
wp-includes/media-template.php
wp-includes/class-wp.php
wp-includes/css/editor.min.css
wp-includes/css/editor.css
wp-includes/script-loader.php
readme.html
wp-admin/network.php
wp-admin/includes/image-edit.php
wp-admin/includes/update-core.php
wp-admin/includes/media.php
wp-admin/js/post.min.js
wp-admin/js/post.js
wp-admin/images/sort-2x.gif
wp-admin/css/wp-admin.min.css
wp-admin/css/wp-admin.css
wp-admin/about.php