(Use this section to tell people about which versions of your project are currently being supported with security updates.)
All versions, past and present. Please help fix the chain.
(Use this section to tell people how to report a vulnerability.)
Say something, any channel of communication. Bug (ha) the shit out of people the riskier you believe it to be.
(Tell them where to go, how often they can expect to get an update on a reported vulnerability, what to expect if the vulnerability is accepted or declined, etc.)
Any channel of communication notifications will flow into email, so go anywhere. All vulnerabilities will be looked at in as timely a manner that is possible and feasible. No such thing as a declined/rejected vulnerability.