TOPo 1.43 allows remote attackers to obtain sensitive information by sending an HTTP request with an invalid parameter to (1) in.php or (2) out.php, which reveals the path to the TOPo directory in the error message.
https://exchange.xforce.ibmcloud.com/vulnerabilities/11248
http://www.securityfocus.com/bid/6768
http://secunia.com/advisories/8008
http://archives.neohapsis.com/archives/bugtraq/2003-02/0049.html