WordPress Release: 4.0.31

TL;DR

WordPress 4.0.31 is a maintenance release that addresses several important bug fixes across different areas of the CMS. This update focuses on improving embed functionality, editor behavior, URL redirection security, theme handling, and admin screen options. The release backports several commits from newer WordPress versions to ensure the 4.0 branch remains stable and secure.

Highlight of the Release

• Fixed embed functionality to ensure title attributes are set correctly
• Prevented HTML decoding issues in the editor
• Enhanced security in wp_validate_redirect() function
• Improved theme error handling
• Added new filter for extending set-screen-option functionality

Migration Guide

No migration steps are required for this maintenance release. WordPress 4.0.31 is a backward-compatible update that focuses on bug fixes and minor enhancements.

Upgrade Recommendations

It is recommended that all WordPress 4.0 users upgrade to version 4.0.31 as soon as possible. This release contains important bug fixes and security enhancements that improve the stability and security of your WordPress installation. As always, it's advisable to back up your website before performing any update.

Bug Fixes

Embed Fixes

• Fixed an issue where title attributes were not being set correctly on embeds, ensuring proper accessibility and hover information.

Editor Improvements

• Resolved an issue where HTML was being incorrectly decoded by setting the proper editor context, preventing potential content formatting problems.

Theme Handling

• Fixed a bug where broken theme names were not being returned properly, improving error reporting and theme management.

URL Redirection

• Enhanced the wp_validate_redirect() function to sanitize a wider variety of characters, addressing potential security concerns with URL redirections.

New Features

New Filter for Admin Screen Options

A new filter has been added to extend the set-screen-option functionality in the WordPress administration area. This enhancement gives developers more control over how screen options are handled and saved, allowing for more customized admin experiences.

Security Updates

Enhanced URL Redirection Validation

The wp_validate_redirect() function has been improved to sanitize a wider variety of characters. This enhancement helps prevent potential security issues related to URL redirections by ensuring more thorough validation of redirect URLs.

Performance Improvements

No specific performance improvements were mentioned in this release. The focus was primarily on bug fixes and security enhancements.

Impact Summary

WordPress 4.0.31 is a maintenance release that addresses several important issues across different areas of the CMS. The update improves embed functionality by ensuring title attributes are set correctly, enhances the editor by preventing HTML decoding issues, strengthens security through improved URL redirect validation, fixes theme handling errors, and adds a new filter for extending admin screen options.

While this release doesn't introduce major new features, it backports several important fixes from newer WordPress versions to ensure the 4.0 branch remains stable and secure. The security enhancement to the redirect validation function is particularly noteworthy as it helps protect sites from potential security vulnerabilities.

Content creators will benefit from improved embed and editor functionality, while administrators will appreciate the enhanced security and theme handling. Developers gain access to a new filter hook for customizing admin screen options.