CVE-2026-53643 — FOSSBilling allows low-privileged staff accounts to perform unauthorized actions via admin API endpoints
FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 allow low-privileged staff accounts to perform unauthorized actions via admin AP…
Published: 2026-07-06 · CVSS: 8.7 · CVSS 4.0
FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 allow low-privileged staff accounts to perform unauthorized actions via admin API endpoints. The root cause is a combination of the `can_always_access` module flag (which grants all staff access to certain modules) and insufficient permission checks or unsafe parameter handling on individual endpoints. Version 0.8.0 contains a fix. Some workarounds are available. Restrict staff accounts to only those who need access to sensitive settings and/or use a reverse proxy or WAF to restrict access to the affected endpoints to trusted IP addresses or higher-privilege roles.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7