WordPress Sifalo Pay plugin 2.0-2.5.2 - Unauthenticated Order Payment Metadata Modification and Forced Order Failure vulnerability

Unauthenticated Order Payment Metadata Modification and Forced Order Failure vulnerability discovered by Pablo González Pérez, Francisco José Ramírez Vicente, and Iñigo Sánchez Enciso in WordPress Plugin Sifalo Pay versions 2.0-2.5.2...