FileMaker Pro 13.0.9
FileMaker Pro and FileMaker Pro Advanced have been updated to version 13.0.9 with a fix for a vulnerability with FileMaker’s root SSL certificates that could allow network communication to be compromised. Note that after this version is installed, FileMaker Pro and FileMaker Pro Advanced will not be compatible with versions of FileMaker Server prior to 13.0.9 if you’re using the built-in SSL certificate and requiring SSL connections. Be sure to read the FileMaker support
page for this security update to follow the correct update path for the FileMaker product you’re running. ($299/$549 new, free update, 620 MB, 10.8+)
"Note that after this version is installed, FileMaker Pro and FileMaker Pro Advanced will not be compatible with versions of FileMaker Server prior to 13.0.9."
I understand this is only true if the in-built SSL certificate for FileMaker Server is used and SSL connections are _required_.
If you use your own custom certificate (which is recommended) or don't use SSL and instead rely on secure WAN connections via a VPN, then the versions are interchangeable.
Thanks for that detail, Rob! I've added it to the text.