An issue in Hostbill v.2025-11-24 and 2025-12-01 allows a remote attacker to execute arbitrary code and escalate privileges via the CSV registration field
https://hostbillapp.com/responsible-disclosure
https://hostbillapp.com/release-notes/12-01-2025.html
https://hostbillapp.com/release-notes/11-27-2025.html
https://hostbillapp.com/changelog
https://blog.hostbillapp.com/2025/12/03/hostbill-security-advisory/