index.php in Aardvark Topsites PHP 5.2.1 and earlier allows remote attackers to obtain sensitive information via a negative integer value for the start parameter in a search action, which reveals the installation path in an error message.
https://exchange.xforce.ibmcloud.com/vulnerabilities/51392
http://www.securityfocus.com/archive/1/504574/100/0/threaded
http://websec.id3as.com/aardvark-topsites-php-521-security-vulnerabilities-disclosure/