Within a SharePoint site, each user is a member of at least one group. By default, SharePoint has the following groups available, each with its own set of permissions already set: Guest, Reader ...

Managing Security in SharePoint 2010 Managing access to information stored in SharePoint can be done at a number of levels. You can secure from the Site Collection, the Site, a specific List or ...

Levels of Security Access in SharePoint Security access in SharePoint can be given either uniquely to a user or a user can be added to a group, at which point they will inherit a set of permissions.

Ars Tribunus Militum 14y 2,451 Apr 21, 2011 #2 The only thing I can think of is your site permissions are set using a high enough permission that would allow them to modify the library permissions ...

Community Members the SharePoint security group: Just like other team sites in SharePoint, when you create a new Community site with unique permissions, SharePoint 2013 automatically creates ...