Chess.com hit by network compromise
Incident
Summary
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The Chess.com breach exposed a third-party file transfer application used by the platform, putting just over 4,500 users at risk of disclosure. Attackers maintained unauthorized access from June 5 to June 18, 2025, and the issue was discovered on June 19, 2025. Potentially exposed data includes names and other PII, while member accounts and financial information were not affected.
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Timeline
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04.09.2025 20:51 2 articles · 8mo ago
Initial report: Chess.com hit by network compromise
Initial DisclosureChess.com discovered unauthorized access to a third-party file transfer application on **June 19, 2025** after the access window ran from **June 5 to June 18**. The breach may have exposed **names** and other **PII** for **just over 4,500 users**.
Show sources
- Chess.com discloses recent data breach via file transfer app — www.bleepingcomputer.com — 04.09.2025 20:51
- Chess.com discloses recent data breach via file transfer app — www.bleepingcomputer.com — 04.09.2025 20:51