Directory traversal vulnerability in the Google Doc Embedder plugin before 2.5.4 for WordPress allows remote attackers to read arbitrary files via a .. (dot dot) in the file parameter to libs/pdf.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/80930
https://euvd.enisa.europa.eu/vulnerability/EUVD-2012-4840
http://www.securityfocus.com/bid/57133