images/captcha.php in RavenNuke 2.30 allows remote attackers to obtain sensitive information via an aFonts array parameter value that does not correspond to a valid font file, which reveals the installation path in an error message.
https://www.exploit-db.com/exploits/8068
https://exchange.xforce.ibmcloud.com/vulnerabilities/48792
http://www.securityfocus.com/archive/1/500988/100/0/threaded