A lock handling issue was addressed with improved lock handling. This issue is fixed in macOS Mojave 10.14.4. A Mac may not lock when disconnecting from an external monitor.
https://support.apple.com/HT209600
Source: Mitre, NVD
Published: 2019-12-18
Updated: 2019-12-26
Base Score: 4.6
Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P
Severity: Medium
Base Score: 7.8
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity: High