PHP 5.5 has been updated to the 5.5.2 version and is available for cPanel shared hosting services, you can select your php version through your cPanel as instructed in the link below:
http://secure.plusplushosting.net/knowledgebase/1090/Selecting-your-PHP-version-through-cPanel.html
About 20 bugs were fixed, including security issue in OpenSSL module (CVE-2013-4248) and session fixation problem (CVE-2011-4718). All users running 5.5.x of PHP are encouraged to upgrade to this release.
Complete change log can be found here: http://www.php.net/ChangeLog-5.php#5.5.2
- Saturday, August 24, 2013