Fakturownia Breach Exposes Password Hashes, Bank Data of Polish Invoicing Platform

**Fakturownia**, a Polish online invoicing platform used by over 600,000 businesses, confirmed an unauthorized server access incident that exposed account information, password hashes, bank account details, authentication/integration tokens, and invoices issued before 2023; payment card data and KSeF certificates were reported unaffected, and the company has blocked access, rotated credentials, deployed new servers, engaged external specialists, and notified authorities. An individual using the alias "Fingerprint" claims responsibility and alleges 6 TB of invoices were stolen and links similar breaches at other Polish SaaS providers, though those claims remain unverified.