kopano-webapp smime plugin affected by efail flaw?

As the last one was closed by fbartels for no reason, here is it again.

Please keep this open and provide public informations if efail affects webapp users with s/mime plugin.

I have given you a reason, see https://forum.kopano.io/topic/1376/kopano-webapp-smime-plugin-affected-by-efail-flaw/2

We’ll make a dedicated followup once there is more to discuss.