Basic-Fit, Europe’s largest budget gym chain by club count, disclosed that hackers breached its membership visit-registration system and stole personal data belonging to about 1 million members across several European countries, including roughly 200,000 in the Netherlands. The company said it detected the intrusion and stopped the unauthorized access within minutes, but not before attackers downloaded a substantial volume of customer information from a central system used across multiple countries.
The exposed data included names, addresses, email addresses, phone numbers, dates of birth, bank account details, subscription status, and recently visited gym locations. Basic-Fit said passwords and identity documents were not stored in the affected environment and have not been found among the stolen data. The company notified the Dutch Data Protection Authority under GDPR requirements, informed affected members directly, and warned customers to remain alert for phishing attempts while the investigation into the unidentified attackers continues.

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Following the breach, Basic-Fit notified the Dutch Data Protection Authority under GDPR requirements, launched an investigation, and directly informed affected members. The company said it had not found evidence of misuse of the stolen data and advised customers to remain alert for phishing attempts.
Basic-Fit confirmed that a significant data breach exposed personal and membership-related data for about 1 million members, including roughly 200,000 in the Netherlands. Exposed data included names, addresses, email addresses, phone numbers, dates of birth, bank account details, subscription status, and recently visited gym locations; the company said passwords and identity documents were not affected.
Unknown attackers gained unauthorized access to Basic-Fit's central membership visit-registration system and downloaded customer data before the intrusion was stopped within minutes. The affected system stored member information from multiple European countries.
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