WordPress Release: 4.4.15

TL;DR

WordPress 4.4.15: Security and Maintenance Update

This release addresses important security vulnerabilities and includes several maintenance updates. Key improvements include proper HTTPS redirection during login and better version string escaping in templates. The update also refreshes the copyright year to 2018 in license files.

This is a security and maintenance release that all WordPress 4.4 users should install immediately to ensure site security.

Highlight of the Release

• Security enhancement for login redirects when using HTTPS
• Improved template security with proper version string escaping
• Updated copyright year to 2018 in license files

Migration Guide

No special migration steps are required when updating to WordPress 4.4.15. This is a standard security and maintenance release that follows the normal WordPress update process:

1. Back up your website files and database before updating
2. Update through the WordPress dashboard or via manual update
3. Verify your site functionality after the update is complete

No database schema changes or template modifications are required for this update.

Upgrade Recommendations

Immediate upgrade strongly recommended for all WordPress 4.4 users.

This release contains important security fixes that protect your site from potential vulnerabilities. Given the security nature of these fixes, all sites running WordPress 4.4.x should be updated to version 4.4.15 as soon as possible.

For sites on older branches, consider updating to the latest WordPress version (beyond 4.4) for the most comprehensive security protection and feature improvements.

Bug Fixes

• Login Security: Fixed an issue with login redirects by implementing wp_safe_redirect() when the login page is forced to use HTTPS. This prevents potential security issues with unsafe redirects. (#42892)

• Template Security: Resolved a vulnerability by ensuring version strings are correctly escaped for use in HTML attributes, preventing potential XSS attacks. (#42893)

• License Information: Updated copyright year to 2018 in license.txt file. (#42424, fixes #43007)

New Features

No significant new features were added in this maintenance release. WordPress 4.4.15 focuses primarily on security enhancements and bug fixes to the existing 4.4 branch.

Security Updates

• Login Redirect Protection: Implemented wp_safe_redirect() for login pages when forced to use HTTPS, preventing potential open redirect vulnerabilities that could be exploited in phishing attacks.

• XSS Prevention: Fixed a potential cross-site scripting (XSS) vulnerability by properly escaping version strings in templates when used within HTML attributes.

These security fixes address important vulnerabilities that could potentially be exploited if left unpatched. Site administrators should update to WordPress 4.4.15 immediately.

Performance Improvements

No specific performance improvements were included in this release. WordPress 4.4.15 focuses on security enhancements and bug fixes rather than performance optimizations.

Impact Summary

WordPress 4.4.15 is primarily a security-focused maintenance release that addresses important vulnerabilities in the login process and template handling. By implementing proper HTTPS redirects during login and correctly escaping version strings in templates, this update significantly improves site security against potential attacks.

While the changes are relatively small in scope (27 changes across 6 files), they address critical security concerns that could otherwise be exploited by malicious actors. The update also includes minor maintenance improvements like updating the copyright year in license files.

This release demonstrates WordPress's ongoing commitment to security maintenance even for older branches, ensuring that sites that haven't yet upgraded to newer major versions remain protected against known vulnerabilities.