The American video service Zoom makes it temporarily impossible to share files via the app, the company announced on its blog. The move follows the discovery of a vulnerability that compromised user safety. It is unclear when the position will return.

In addition to this measure, Zoom no longer shows the unique number of a meeting in the title of the toolbar, the company reports on its blog. Users can use this unique number to find and join a video meeting.

No longer displaying the unique song in the title makes it more difficult for people to find the meeting when they come across the song in public places, such as on social media.

For example, British Prime Minister Boris Johnson posted a screenshot of a meeting with his cabinet on Twitter on March 31. The toolbar title showed the unique Zoom number, which can be used by anyone to join the meeting.

The British cabinet meeting was closed with a password, but this was not always the case. In such a case, people may intrude at video conferences undesirably. This practice is known as 'Zoom bombing'.

Instead of the unique number, the toolbar now contains the word Zoom. In addition, the company has also made other changes to combat 'bombing'. For example, meetings of free accounts now have a waiting area as standard, so that a participant is not immediately visible to others. Meetings of these accounts are also provided with a password by default.