Parallels Plesk Panel 9.5.2 is compatible with Parallels Virtuozzo Containers 4.6.
http://www.parallels.com/products/plesk/download/thank-you
http://www.parallels.com/download/plesk/templates/
Comment
We have published Security Update #3 for Parallels Plesk Panel 9.3.0 that fixes PHP fasCGI vulnerability:
[-] An unauthenticated remote attacker being able to compromise the system and gain control over it security issues were resolved.
Parallels Plesk Panel 9.5.2 for CentOS/RHEL 5.5 is available for downloads and installation through Autoinstaller since 7th June.