Isinbayeva, 24, won gold after she cleared 4.84 meters (15.87 feet). She tried to set a new indoor world record at 4.94 meters (16.20 feet), only four days after she set a previous record of 4.93 meters (16.17 feet) in Donetsk, Ukraine, but failed in all her three attempts.
Feofanova followed her with silver after she cleared 4.74 meters mark (15.55 feet).
Isinbayeva, who became the first woman in the world to vault clear at 5.01 meters (16.43 feet) during the 2005 World Outdoor Championships in Helsinki, was twice named Athlete of the Year by the International Association of Athletics Federations (IAAF), in 2004 and 2005.
She is currently ranked ninth in the association's overall rating.