CVE-2021-21301

Wire is an open-source collaboration platform. In Wire for iOS (iPhone and iPad) before version 3.75 there is a vulnerability where the video capture isn’t stopped in a scenario where a user first has their camera enabled and then disables it.
It’s a privacy issue because video is streamed to the call when the user believes it is disabled. It impacts all users in video calls.

This is fixed in version 3.75.

Source: CVE-2021-21301