The SOAP parser in PHP before 5.3.22 and 5.4.x before 5.4.12 allows remote attackers to read arbitrary files via a SOAP WSDL file containing an XML external entity declaration in conjunction with an entity reference, related to an XML External Entity (XXE) issue in the soap_xmlParseFile and soap_xmlParseMemory functions.
http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=188c196d4da60bdde9190d2fc532650d17f7af2d
http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=afe98b7829d50806559acac9b530acb8283c3bf4