A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina, Security Update 2021-004 Mojave. A person with physical access to a Mac may be able to bypass Login Window.
https://support.apple.com/en-us/HT212530
Source: MITRE
Published: 2021-09-08
Updated: 2021-09-16
Type: CWE-287
Base Score: 2.1
Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N
Impact Score: 2.9
Exploitability Score: 3.9
Severity: LOW
Base Score: 4.6
Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Impact Score: 3.6
Exploitability Score: 0.9
Severity: MEDIUM