Fedora 27 Server Beta freeze exception bug tracker: http://fedoraproject.org/wiki/BugZappers/HouseKeeping/Trackers
To propose a bug as a freeze exception bug for the Fedora 27 Server Beta release, mark it as blocking this bug, or use the webapp: https://qa.fedoraproject.org/blockerbugs/propose_bug . It will be reviewed according to https://fedoraproject.org/wiki/QA:SOP_freeze_exception_bug_process .
If you think the bug is sufficiently serious to block the Server Beta release, instead mark it as blocking the bug F27ServerBetaBlocker. See https://fedoraproject.org/wiki/QA:SOP_blocker_bug_process for the blocker process.
The Modular Server Beta release has happened, and Final will no longer happen.