CVE-2026-43920 FOSSBilling: Unauthenticated update patcher endpoint allows remote maintenance execution

FOSSBilling is a free, open-source billing and client management system. In versions 0.5.4 through 0.7.2, the /run-patcher maintenance endpoint in FOSSBilling was accessible without authentication, which allowed unauthenticated remote users to trigger update patch routines that modify configurati...