I have come across this issue just recently.

We have migrated our boards from one company to another, and created new spaces to separate them.

I then created a new board in a new space thinking it would inherit the permissions, only to find the entire team (118) people had edit access by default to a private board.

Luckily this was discovered quickly and the permission amended.

I would be very interested in  a response as to why this is the case.

Hi ​@sarah.kelly,

Thanks for sharing your experience! I wanted to let you know that the original poster (Wein) had a conversation with Miro Support about this, and they confirmed that boards do not automatically inherit space permissions. Instead, boards follow the team’s default sharing settings unless you manually adjust them.

Here’s what Miro Support suggested to ensure a board is only accessible to space members:

1. Check your space permissions – Make sure only the intended members have access.

2. Create a new board in the space.

3. Manually update the board’s sharing settings:

   • Open the board, click Share (three dots) > Sharing settings

   • Set Team, Organization, and shared link access to "No access"
      

     

     
      

     

      

   • This ensures only members of the space can access the board

This workaround helped Wein resolve the issue. Does this answer your question as well? Let me know if you need more details!

I would suggest that this is not the correct way to achieve a secure board.

Instead I would recommend the following:

1. Manually create a new board
2. Name the board
3. Move the board to the required space and share with the appropriate people

The reason for this different process is that a board created manually not in a space has the most secure settings and cannot be viewed by anyone unless explicitly shared.

This is a much more secure position.

Hi ​@sarah.kelly, thanks so much for following up and sharing your suggested approach — that’s a helpful addition to the conversation!