An access issue was addressed with additional sandbox restrictions. This issue is fixed in iOS 12.3. A sandboxed process may be able to circumvent sandbox restrictions.
https://support.apple.com/HT210118
Source: Mitre, NVD
Published: 2019-12-18
Updated: 2020-08-24
Base Score: 6.8
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P
Severity: Medium
Base Score: 9.6
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Severity: Critical