The holder of any mortgage of real property, when the mortgage contains provisions authorizing advancements thereunder for taxes, insurance premiums, public assessments and repairs, may make such advancements and, when made, they shall be secured by the mortgage and have the same rank and priority as the principal debt thereby secured and bear interest from the date of such advancements, as provided in the mortgage. Advancements made for taxes by any such mortgage holder shall be a first lien on the mortgaged real property to the extent of the taxes so paid with interest from the date of payment, regardless of the rank and priority of the mortgage under which such taxes are advanced.