was looking into upgrading to 10.4 and came across this statement in the "whats new", it seems pretty broad and i guess just supposed to take their word for it, but i was wondering if anyone can guide me to more details about the following statement from esri's website:
ArcGIS 10.4 for Server includes several fixes and enhancements that improve the security of the software. It's recommended that you upgrade to 10.4 to help protect your ArcGIS Server infrastructure.
It appears Esri have upgraded the internal software.
ArcGIS 10.3.1 for Server comes with:
ArcGIS 10.4 for Server comes with:
Those software should have some security fixes.
Did you check the issues addressed list?