Riot police used rubber bullets, tear gas and smoke grenades to disperse protestors at Durban's Moses Mabhida stadium early Monday, just two hours after the Germany-Australia match ended.
Several hundred private security officers who work at the stadium during the FIFA World Cup were demanding more pay at a stadium parking lot.
One woman suffered minor injuries after being hit by a rubber bullet, police said, adding no one was seriously hurt when police charged against the group.
However, two percussion grenades that police used to disperse demonstrators caused panic in the nearby media centre and other areas of the World Cup facility, with reporters and volunteers running away from the noise.
Security has been a major concern at the first World Cup ever held on African soil. The stadium is to host the Spain-Switzerland match Wednesday.