Any known vulnerability has been published with appropriate actions for resolution here: Security Bulletins
Please verify you are running the latest version of Tableau Server to keep security up to date.
Check out the Tableau Server hardening process. https://onlinehelp.tableau.com/current/server/en-us/security_harden.htm
I think you'll find these issues are resolved once you've followed these steps. If you need help, please submit a support case.