Today, a fix to a security bug in MAAS 2.7 was released to the “2.7” (stable) snap. See https://bugs.launchpad.net/maas/+bug/1864201 for details.
All users who have previously installed the 2.7 snap should already be patched automatically. If you still appear to be experiencing the issue, please attempt a “snap refresh maas” before filing another bug.