WordPress Link Invoice Payment for WooCommerce plugin <= 2.8.0 - Missing Authorization to Unauthenticated Arbitrary Partial Payment Creation/Cancellation vulnerability

Missing Authorization to Unauthenticated Arbitrary Partial Payment Creation/Cancellation vulnerability discovered by Md. Moniruzzaman Prodhan NomanProdhan - Knight Squad in WordPress Plugin Invoice Payment for WooCommerce versions = 2.8.0...