This issue was addressed with improved checks. This issue is fixed in Security Update 2021-005 Catalina, macOS Big Sur 11.6. A local user may be able to read arbitrary files as root.
https://support.apple.com/en-us/HT212805
https://support.apple.com/en-us/HT212804
Source: Mitre, NVD
Published: 2021-10-19
Updated: 2022-07-12
Base Score: 4.9
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:N/A:N
Severity: Medium
Base Score: 5.5
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N