A consistency issue was addressed with improved state handling. This issue is fixed in iOS 12.2. A website may be able to access the microphone without the microphone use indicator being shown.
https://support.apple.com/HT209599
Source: Mitre, NVD
Published: 2019-12-18
Updated: 2020-08-24
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N
Severity: Medium
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N