Checking whether user liked the media or not even when you are blocked

How it was found

Poc : Take 2 accounts A and B 1.) Now from A id make a random post say http://vk.com/id307083341?w=wall307083341_36 2.)Now from C id try to like the post of A . 3.)Now from B id visit https://vk.com/dev/likes.getList 4.) now put the owner id A and the post id == > 307083341 which 36 in this case 5.)and in the the friends_only field change 1 to 0 6.)then hit run you will find that vk.com will return the array of guys who have liked it now open another tab
7.)Now block B from A account . 8.)Now try to again query https://vk.com/dev/likes.getList the same from 3 you will find that now vk.com will not allow you ! error but now 9.)But these methods are not protected === > Visit now https://vk.com/dev/likes.isLiked and now put the owner_id=[307---], item_id=36 , user_id of the guy to which you have to check whether he has liked or not the media and this time their is no error and vk.com will show liked : 1

Hence no where in the application this information is being disclosed but here is the end point leaking the information raj_v