A newly discovered glitch in Zoom’s screen sharing feature can accidentally leak sensitive information to other attendees in a call. The issue stems from the fact that a second application that’s overlayed on top of an already shared application can reveal its contents for a short period of time. The flaw was tested on versions 5.4.3 and 5.5.4 across both Windows and Linux clients. A malicious participant of a Zoom meeting can take advantage of the weakness by making use of a screen capture tool to record the meeting and playback the recording to view the private information.
Source: https://thehackernews.com/2021/03/new-zoom-screen-sharing-bug-lets-other.html