WordPress 3.4.2 hardens security

WordPress 3.4.2, now available for download, is a maintenance and security release for all previous versions.

After nearly 15 million downloads since 3.4 was released not three months ago, the developers identified and fixed a number of bugs, including:

• Fix some issues with older browsers in the administration area.
• Fix an issue where a theme may not preview correctly, or its screenshot may not be displayed.
• Improve plugin compatibility with the visual editor.
• Address pagination problems with some category permalink structures.
• Avoid errors with both oEmbed providers and trackbacks.
• Prevent improperly sized header images from being uploaded.

Version 3.4.2 also fixes a few security issues and contains some security hardening.

The vulnerabilities included potential privilege escalation and a bug that affects multisite installs with untrusted users. These issues were discovered and fixed by the WordPress security team.