Amazon Flexible Payments Service (FPS) PHP Library does not verify that the server hostname matches a domain name in the subject's Common N…

Amazon Flexible Payments Service (FPS) PHP Library does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate, related to misinterpretation of a certain "true" value.