WOW!

Don't forget that it's likely other methods that haven't been leaked still exist and are unknown to the devs. Considering they completely closed the whole game, they definitely do not know how to fix it at this moment. It could take more than just a day for them to completely figure it out.

It's not that hard.

The crash happens when an item is thrown outside of the map. This, the server cannot handle. There are many fixes:

They can make a loop that checks if anyone is sitting in the borders, and autoban/disconnect him.

They can make an if statement like, if (itemIsAttemptingTobeDropped) -> if the player is not close to the coordinates of the border -> then and only then they actually *drop* the item.

They can also somehow handle exceptions thrown by throwing items off map, client sided-ly. At the moment, if such an exception comes up, the server doesn't know what to do, so it disconnects all the players. Instead, they can make something like a Try Catch, with try being "Try to drop the item" and catch being disconnect the player, so if an exception is thrown for dropping an item, only the player is disconnected, and the item is never actually thrown.

But I guess this is easier said than done.

Well the exploit is definitely patchable, but lets talk damage control. I'd assume there is no way for all the UBHPs/other items gained from duping to be 'deleted', but are dupers at the risk of being banned? It seems like there is no way Kabam/DECA/whoever could determine what players specifically caused a crash.

So no one is thinking about black walls that they can just put around the map? If you go through a black wall, you most likely get kicked. As in Abyss and nexus and the other dungeons. And thanks. Not so much hate in here against me.

last time something like this happened, kabam banned all accounts created within that period of time, that had gained no exp, and had no deaths.

server roll back

They could make it impossible to noclip in a spriteworld without getting kicked.. but thats not a fix. This still works, just go to position 0,0 and drop an item. A krelay plugin can do that fast enough without you getting kicked, until you have dropped the item.

Ahh. They can try to block outside connections? So proxy server doesn't work maybe?

but if it was done client sided couldnt the coding in the client be edited to where you could still do it just how hacked clients are made and what not?

"They patched a duping method within hours/days. RotMG might be saved by the help from Deca games. RIP Hacks on RotMG."

I'm all for getting rid of Kabam and their unattentive disposition to rotmg, but I don't think you're fully estimating the amount of duping that rotmg has gone through.
Literally, this has happened in the same circumstances, a dupe is made public as game ownership is being transferred and hella people dupe hella fuckin shit because fuck it right?
RotMG is doomed imo, economy has been so shit ever since they took out amulets and some old players could argue even before that, what I'm trying to stress is that even though Deca hasn't put that servers back up with 'this' option to dupe as patched, there are other ways out there and there is always so much more going on behind the scenes.
also, rip ubhp.

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not necessarily, there is usually quite a distinct barrier between client-sided and server-sided happenings in a game.
In this instance, hacked clients usually edit the client-sided shit, (that confuse that just hit you is not really affecting the server much, and although it is registered by the server, it is easier on lag and general data-transfer to keep shit like that on your end. yaknow?)
But in this case, what he has suggested would be something that would most likely be server-sided, so when he mentions the TryCatch thing, it has a possibility.
Although I dunno if its feasible because of coding issues, if there is an attempt to drop an item in any dungeon (lets not limit to sprite worlds goofus) and that person happens to be within the first 5 tiles surrounding the dungeon, it could client-sidedly kick them even before the server registers an item has dropped.
take my words with a grain of salt because truly i dunno man

do you even know what a proxy is?