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Antes de 9.6.0-alpha.7 y 8.6.33, cuando la autenticaci\u00f3n multifactor (MFA) v\u00eda TOTP est\u00e1 habilitada para una cuenta de usuario, Parse Server genera dos c\u00f3digos de recuperaci\u00f3n de un solo uso. Estos c\u00f3digos est\u00e1n destinados como un mecanismo de respaldo cuando el usuario no puede proporcionar un token TOTP. Sin embargo, los c\u00f3digos de recuperaci\u00f3n no se consumen despu\u00e9s de su uso, permitiendo que el mismo c\u00f3digo de recuperaci\u00f3n sea utilizado un n\u00famero ilimitado de veces. Esto anula el dise\u00f1o de un solo uso de los c\u00f3digos de recuperaci\u00f3n y debilita la seguridad de las cuentas protegidas por MFA. Un atacante que obtiene un solo c\u00f3digo de recuperaci\u00f3n puede autenticarse repetidamente como el usuario afectado sin que el c\u00f3digo sea invalidado. 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