CVE-2026-42341 FOSSBilling has an unauthenticated payment bypass via IPN callback forgery

FOSSBilling is a free, open-source billing and client management system. Versions 0.6.0 through 0.7.2 have an unauthenticated payment bypass vulnerability in FOSSBilling's IPN callback endpoint. When the Custom payment adapter is enabled, an attacker can mark any unpaid invoice as paid and credit...

CVE-2026-42341

FOSSBilling versions 0.6.0–0.7.2 contain an unauthenticated payment bypass in the IPN callback endpoint. When the Custom payment adapter is enabled, an attacker can mark any unpaid invoice as paid and credit the client account without a real payment by sending a crafted HTTP request. Version 0.8....