if user with list role rights modifies a subscriber, the subscriber gets removed from all other lists

[violoncelloCH]

Version:

• listmonk: [eg: v4.1.0]
• OS: Docker (on CoreOS)

Description of the bug and steps to reproduce:
given the following setup with two users, one of them having a list role

alice: super admin
bob: list role with write rights on list a, role with all subscriber permissions

Steps to reproduce:

1. alice adds a subscriber to a list a and list b
2. bob removes the subscriber from list a (which he has the right to)
3. notice that the subscriber also has been removed from list b (and all other lists he has been subscribed to

[knadh]

This is trickier than I thought.

User A has access to lists [a, b]. User B has access to lists [a, c]. S is subscribed to lists [a, b, c].

• When A logs in, on S, currently, A can see the list [c] although they don't have access to it.
• Similarly, B can see [a] on Sub although they don't have access to it.

If these lists on S are hidden from A and B, then they can't really know the true state of the subscriber. A will only see list [a] on S and would never know that S is on other lists. A way out here is to not hide the fact, but replace the name of the list with a constant name like *Restricted.

But what about the manage permission then? If S has a list on them that A doesn't have access to, then can A not delete the subscriber until that list is removed from the subscriber by B?