Limited-access user permission lockdown mode
When this feature is enabled, permissions for users in the "limited access" permissions level (such as Anonymous Users) are reduced, preventing access to Application Pages.
SharePoint 2016
Feature Details
7c637b23-06c4-472d-9a9a-7c175762c5c4
Site
False
True
False
C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\Template\Features\ViewFormPagesLockDown
Microsoft.SharePoint.Publishing.ViewFormPagesLockDownFeatureHandler, Microsoft.SharePoint.Publishing, Version=16.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c