PT-2026-56038 · Fossbilling · Fossbilling
Mitchell45
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Published
2026-07-06
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Updated
2026-07-06
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CVE-2026-53645
CVSS v4.0
8.5
High
| Vector | AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:L |
FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 allow a low-privileged staff account to grant arbitrary module permissions to itself through the admin API, resulting in persistent privilege escalation. A staff user that only has
staff.create and edit staff can call /api/admin/staff/permissions update targeting their own account and write any permission structure, bypassing the intended role-based access control boundary. Version 0.8.0 patches the issue. Some workarounds are available. Restrict the staff.create and edit staff permission to only highly trusted staff members and/or use a reverse proxy or WAF to restrict access to /api/admin/staff/permissions update to specific trusted roles.Fix
Improper Privilege Management
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Weakness Enumeration
Related Identifiers
Affected Products
Fossbilling