A path handling issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.0.1. A remote attacker may be able to modify the file system.
https://support.apple.com/kb/HT212011
https://support.apple.com/en-us/HT211931
http://seclists.org/fulldisclosure/2020/Dec/32
http://seclists.org/fulldisclosure/2020/Dec/26
Source: Mitre, NVD
Published: 2020-12-08
Updated: 2022-10-12
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 5.5
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N