CVE-2026-53643
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.
- Score
- CVSS 4.0 8.7 High
- Status
- Deferred - security-advisories@github.com
- Published
- 2026-07-06
- Last modified
- 2026-07-07
- Weaknesses
- CWE-200, CWE-639, CWE-862
Affected products
References
- https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-563q-g4r4-6f9m
