This critical update
Guest users typically don’t need access to view all users in a Salesforce org, so to promote data security, we disabled the View All Users permission in guest user profiles. If you have an org created before Winter ’20, we recommend that you check guest user access and deselect the View All Users permission in all your guest user profiles. To enhance security, we also removed these permissions from the guest user profile: Can Approve Feed Post and Comments, Enable UI Tier Architecture, Remove People from Direct Messages, View Topics, and Send Non-Commercial Email.
Where: This change applies to orgs with active communities in Enterprise, Essentials, Unlimited, Performance, and Developer editions.
How: Check all guest user profiles in your org, including guest user profiles for communities, legacy portals, Force.com sites, and Site.com sites. Deselect View All Users where applicable.
will be forcibly installed in all orgs.
In my case, I have two communities that use two guest users that are the view all and modify all permissions on a huge amount of objects.
How do you suggest facing up this problem?