this is what happened to me with 2 sites (soundcloud, and musicgateway.net) last week, but both sites 'fixed' the certificate issue. so something's definitely up (i too could get in with firefox, but not safari, chrome, or opera).
still... wired works here. am on public beta 5, what version of sierra are you running? and you might try emptying the cache, and removing the data for wired.com from safari preferences>privacy etc...