There's no time frame to report on when you might see support for TLS 1.3 in cPanel & WHM. OpenSSL 1.1.1 or higher will first need to be shipped with CentOS, and Apache will need to support it through mod_ssl. Both of these steps would need to happen before it was supported with cPanel & WHM. I encourage you to open a feature request to track the progress:
mod_ssl: Add support for OpenSSL 1.1.1 and TLSv1.3. TLSv1.3 has behavioural changes compared to v1.2 and earlier; client and enhanced for TLSv1.3 ciphers, but applies at vhost level only.
"
mod_ssl: Add support for OpenSSL 1.1.1 and TLSv1.3. TLSv1.3 has
behavioural changes compared to v1.2 and earlier; client and
configuration changes should be expected. SSLCipherSuite is
enhanced for TLSv1.3 ciphers, but applies at vhost level only."
Thanks for sharing! It looks like the feature request is up to 20 votes.
I encourage anyone else visiting this thread and wanting this feature to go and vote for it. We'll update the feature request with more information as it becomes available.
There's no specific time frame to offer at this time. The development team responsible for EasyApache took some time to evaluate adding support for OpenSSL 1.1.1 and determined it's addition will require significant testing and modifications to existing RPMs. It's still planned, but it's not something that can be integrated immediately. We'll update the feature request as soon as new information is available: