Vulnerabilidad · Publicado 14/08/2026
El plugin Flex Objects (versiones hasta 1.4.6) en Grav CMS contiene un fallo de control de acceso en su API que permite a usuarios autenticados con permisos básicos ejecutar operaciones sin validar restricciones de campo, usuario o administrador. Afecta principalmente a sitios que exponen la Flex API sin restricciones de red. Empresas en LATAM usando Grav para portales internos o públicos deben verificar su configuración de permisos inmediatamente.
The Flex Objects plugin (through 1.4.6, tested with Grav 2.0.11) contains an incorrect authorization vulnerability in its Flex Objects API. FlexApiController::update() checks only the general Flex directory permission and does not apply the additional target/field/super-admin checks enforced by the dedicated Users and Groups API controllers. An authenticated account with api.access, admin.login, and users.update permissions (but without api.users.write or admin.super) can use the generic /api/v1/flex-objects/user-accounts endpoint to change a super administrator's password, or the /api/v1/flex-objects/user-groups endpoint to grant its group admin.super, resulting in full site takeover. Fixed in Flex Objects 1.4.7.
Score: 8.8/10 — Severidad: HIGH — Estado NIST: Received
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-863
Publicado en NIST NVD.