CVE-2026-53645

Gravedad CVSS v4.0:

ALTA

Tipo:

CWE-269 Gestión de privilegios incorrecta

Fecha de publicación:

06/07/2026

Última modificación:

06/07/2026

Descripción

*** Pendiente de traducción *** 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.

Impacto

Vector 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:L CVSS v4.0 Severidad y Métricas:

Puntuación base: 8.50 ALTA
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:L

Vector de acceso (AV): A través de red
Complejidad de acceso (AC): Bajo
Attack Requirements (AT): Ninguno
Privilegios Requeridos (PR): Bajo
Interacción del usuario (UI): Ninguno
Confidentiality (VC): Ninguno
Integrity (VI): Alto
Availability (VA): Ninguno
Confidentiality (SC): Alto
Integrity (SI): Alto
Availability (SA): Bajo

Puntuación base 4.0

8.50

Gravedad 4.0

ALTA

Referencias a soluciones, herramientas e información

https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-4hf7-xxxw-64rm