Alstrasoft Article Manager Pro 1.6 allows remote attackers to obtain sensitive information via (1) a quote character or possibly an invalid value in the action parameter in a request to mrarticles.php or (2) a login QUERY_STRING to admin.php without any additional parameters, which reveal the path in various error messages.
https://exchange.xforce.ibmcloud.com/vulnerabilities/26676
http://www.vupen.com/english/advisories/2006/1943
http://www.securityfocus.com/archive/1/434847/100/0/threaded