@Madness,
Just install the appropriate OpenSSL package manually, a nice procedure has been given in:
https://talk.plesk.com/threads/important-exploit-in-sslv2-update-openssl.337191/#post-797678
After installing the OpenSSL 1.0.1s version, you should still run the command: plesk sbin pci_compliance_resolver --enable <service>
This command will not only allow TLS 1.2, but also disallow all vulnerable SSL connections (read: securing your server according to PCI compliance settings).
Note that, if you decide to apply PCI compliant settings to all services, you can simple use the "--enable flag" alone (without a service name behind it), in which case ProFtpd will also be made PCI compliant, which on it´s turn requires that you enable passive ports (just add a file called custom.conf to /etc/proftpd.d directory and add to the content the line "ServerIdent Off" and the line "PassivePorts <start port range> <end port range>", with some custom port range).
Hope the above helps a bit.
If you have questions, just let me know.
Regards......