Blockchain game MapleStory Universe's off-chain server was breached, with some user data accessed.

MapleStory Universe disclosed an unauthorized intrusion into parts of its off-chain server infrastructure, detected on Nov. 12, which forced a full maintenance shutdown of all services from 12:43 Beijing time that day. The project said its blockchain and smart contracts were unaffected and no assets were moved or stolen, but attackers accessed some users' wallet addresses, login IPs, device information and partial email addresses, plus data on 328 apps registered in its Builder Center, including API keys. MapleStory Universe said it has cut off the intrusion path, replaced affected servers and will rotate operational keys before restoring service, with the investigation ongoing. The incident matters because it shows off-chain infrastructure, not on-chain contracts, as the weak point for a gaming token ecosystem, and users should watch for the service restart and any key-rotation or data-exposure follow-up.