The PHP team has announced the availability of PHP 5.4.1, which was previously in Release Candidate stage.

Originally posted by PHP.net
The PHP development team announces the immediate availability of PHP 5.3.11 and PHP 5.4.1. These releases focuses on improving the stability of the current PHP branches with over 60 bug fixes, some of which are security related.

Security Enhancements for both PHP 5.3.11 and PHP 5.4.1:

Fixed bug #54374 (Insufficient validating of upload name leading to corrupted $_FILES indices). (CVE-2012-1172).
Add open_basedir checks to readline_write_history and readline_read_history.
Security Enhancement affecting PHP 5.3.11 only:

Fixed bug #61043 (Regression in magic_quotes_gpc fix for CVE-2012-0831).
Key enhancements in these releases include:

Added debug info handler to DOM objects.
Fixed bug #61172 (Add Apache 2.4 support).
For a full list of changes in PHP 5.3.11 and PHP 5.4.1, see the ChangeLog. For source downloads please visit our downloads page, Windows binaries can be found on windows.php.net/download/.

All users of PHP are strongly encouraged to upgrade to PHP 5.3.11 or PHP 5.4.1.
Our customers which have a VPS, Dedicated (or Semi-Dedicated) Server, eNlight Cloud or Cloud Server with us may contact us to update PHP for you. However, you can also do this easily yourself through "EasyApache" within the WHM interface.

It is always recommended to never have an unsupported version of PHP in use on your server for security reasons.

Read more regarding the latest release: PHP: News Archive - 2012