Running 1.11.2 A player claims that he is crashing the server by using a private hacked client. The server crashes every time the player says he will crash it. There are no logs of the player using commands or sending chat messages. I have reason to believe it is some sort of exploit but unsure what exactly. Crash log: https://hastebin.com/hukupibofi.sql Notable plugins that are listed in the crash log dump: - Factions/MassiveCore - NuVotifier - LWC I doubt any of those plugins are related to the crash. I think the first part of the dump is suspicious. The part contains “CraftItemStack”, “CraftMetaBook”, “CraftChatMessage” and “regex” Could this be related to an item, a book, a message or some regex patterns glitching on 1.11.2? The player had no book in their inventory while performing this so I don’t think it is related. Not sure what the first part of the dump means but any help is very appreciated. Thank you for your time.