REMLAB Web Mech Designer 2.0.5 allows remote attackers to obtain the full path of the script via an incorrect Tonnage parameter to calculate.php that triggers a divide-by-zero error, which leaks the path in an error message.
https://exchange.xforce.ibmcloud.com/vulnerabilities/30538
http://www.securityfocus.com/archive/1/453020/100/0/threaded