Chess.com Third-Party Breach (September 2025)

📅 2025-09-01 🏢 Third-party vendor

Primary Source ↗

Incident Details

In 2025, Chess.com experienced a data security incident via a third-party vendor relationship. The compromised third-party vendor was Third-party vendor. Source reporting: https://therecord.media/chess-platform-data-breach-file-transfer-tool

Technical Details

Initial Attack Vector: Compromise of third-party service provider / vendor relationship
Vendor / Product: Third-party vendor
Supply Chain Attack: ✅ Confirmed third-party / vendor compromise

Timeline

2025-09-01 Breach occurred
2025-09-01 Publicly disclosed