Directory traversal vulnerability in index.php in ModX 0.9.1 allows remote attackers to read arbitrary files via a .. (dot dot) sequence and trailing NULL (%00) byte in the id parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25895
http://www.vupen.com/english/advisories/2006/1383
http://www.securityfocus.com/bid/17533
http://www.securityfocus.com/archive/1/431010/100/0/threaded