WP 3.8.2 and Domain Mapping SSO

The latest WordPress security release (3.8.2) mentioned among other things:

This releases fixes a weakness that could let an attacker force their way into your site by forging authentication cookies.

Is there any possibility that this affects how SSO and cross cookies work, particularly using SSL? I have some SSL issues on my network (using WP Engine) that seemed to start around the day 3.8.2 was released, so I'm curious if it's a possibility.