An access issue was addressed with improved access restrictions. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina. A malicious application may be able to access a user's call history.
https://support.apple.com/en-us/HT212530
https://support.apple.com/en-us/HT212529
Source: Mitre, NVD
Published: 2021-09-08
Updated: 2022-07-12
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N
Severity: Medium
Base Score: 5.5
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N