CVE-2018-17175

In the marshmallow library before 2.15.1 and 3.x before 3.0.0b9 for Python, the schema "only" option treats an empty list as implying no "only" option, which allows a request that was intended to expose no fields to instead expose all fields (if the schema is being filtered dynamically using the "only" option, and there is a user role that produces an empty value for "only").

In the marshmallow library before 2.15.1 and 3.x before 3.0.0b9 for Python, the schema "only" option treats an empty list as implying no "only" option, which allows a request that was intended to expose no fields to instead expose all fields (if the schema is being filtered dynamically using the "only" option, and there is a user role that produces an empty value for "only").

En la biblioteca marshmallow en versiones anteriores a la 2.15.1 y versiones 3.x anteriores a la 3.0.0b9 para Python, la opción de esquema "only" trata una lista vacía como si no implicase la opción "only", lo que permite que una petición diseñada para no exponer campos los exponga todos (si el esquema se está filtrando de forma dinámica mediante la opción "only" y hay un rol de usuario que produce un valor vacío para "only").