An issue in Hostbill v.2025-11-24 and 2025-12-01 allows a remote attacker to cause a denial of service via the Checkout Authentication Flow component
https://hostbillapp.com/responsible-disclosure
https://hostbillapp.com/release-notes/11-27-2025.html
https://hostbillapp.com/changelog
https://github.com/Muhammad5235/HostBill-CVEs-2025/blob/main/Rate%20Limit%20Bypass/Description
https://blog.hostbillapp.com/2025/12/03/hostbill-security-advisory/