WordPress Planyo online reservation system plugin <= 3.0 - Unauthenticated Server-Side Request Forgery vulnerability

Unauthenticated Server-Side Request Forgery vulnerability discovered by chaeyp, Ronnachai Sretawat Na Ayutaya Simonhaskelly, Ronnachai Chaipha rxnr in WordPress Plugin Planyo online reservation system versions = 3.0...