Does opening 9443 for SAML on FortiGate potentially open up SSL security flaws?

We are in the process of moving our VPN users to IPSec RA VPN, but we need to use SAML SSO. This requires some port to be opened up, so we're using tcp/9443 like the documentation. The reason we're moving away from SSL VPN is because of the large number of security flaws being discovered and attacked in the wild. Is the port we open up for SAML going to keep us susceptible to newly discovered SSL/TLS security flaws? Thank you.