If a player does not have access to a world and tries to use a portal that goes to it, it produces no error or reasoning to the player (A configurable message would be great). This may cause some confusion, such as the player thinking the portal is simply broken.
Version: 2.5-b678
Spigot Version: git-Spigot-1447 (MC: 1.7.9)
I accidentally reported this in MV-Core the first time around, my bad.