The request_path function in includes/bootstrap.inc in Drupal 7.14 and earlier allows remote attackers to obtain sensitive information via the q[] parameter to index.php, which reveals the installation path in an error message.
https://exchange.xforce.ibmcloud.com/vulnerabilities/75531
http://www.securityfocus.com/bid/53454
http://www.openwall.com/lists/oss-security/2012/08/02/8
http://www.mandriva.com/security/advisories?name=MDVSA-2013:074
http://archives.neohapsis.com/archives/bugtraq/2012-05/0055.html
http://archives.neohapsis.com/archives/bugtraq/2012-05/0052.html