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Chess.com: Third-Party File Transfer App Breach Disclosed

🔒 Chess.com disclosed a data breach after threat actors gained unauthorized access to a third-party file transfer application used by the platform. The intrusion persisted from June 5 to June 18, 2025, and was discovered on June 19, prompting an investigation and engagement of outside experts. Chess.com says its own infrastructure and member accounts were not affected; just over 4,500 users may have had names and other PII accessed. No financial information appears exposed, and affected members are being offered 1–2 years of free identity theft and credit monitoring.