SharePoint Site: User Cannot see each other name

Recently we had issue in one of our SharePoint Server Farm, where except sharepoint admin all other user cannot see each other name in "created by" or "modified by" field. This means if user "A" logs-in to the sharepoint site, he could only see his\her name in all the libraries/lists items for "created by" or "modified by" fields if he has modified/created those items, for all other items these field values are blank..

After 2 days of R & D, we came to know that, this issue was related to "User Information List".

Check this blog for introduction of this hidden list


To resolve this issue, open the user Information List using SharePoint Designer, as shown in figure below



The permission of User Information list was set to "Only their Own", specify which itmes user can read field value.

Change this "All items", as shown in figure below: