On March 21–22, 2015, Vladinova competed at the 2015 Thiais Grand Prix finishing 21st in the all-around. On March 27–29, Vladinova competed at the 2015 Lisboa World Cup finishing 12th in the all-around. On April 10–12, Vladinova finished 24th in the all-around at the 2015 Pesaro World Cup. Vladinova competed at the 2015 Holon Grand Prix finishing 10th in all-around. On May 22–24, Vladinova competed at the 2015 Tashkent World Cup finishing 8th in the all-around. She qualified to 2 apparatus finals. On June 15–21, Vladinova competed at the inaugural 2015 European Games where she finished 12th in the all-around. On August 15–17, Vladinova competed at the 2015 Sofia World Cup and finished 7th in the all-around ahead of Azeri gymnast Marina Durunda. She qualified to all apparatus finals, finishing 5th in ball, 7th in hoop, clubs and 6th in ribbon. At the 2015 World Cup Final in Kazan, Vladinova finished 8th in the all-around. On September 9–13, Vladinova competed at the 2015 World Championships in Stuttgart and finished 10th in the All-around finals with a total of 70.115 points.