phpCOIN 1.2.2 allows remote attackers to obtain the installation path via a direct request to config.php, which leaks the path in an error message because the _CCFG['_PKG_PATH_DBSE'] variable is not defined.
http://www.vupen.com/english/advisories/2005/2888
http://www.securityfocus.com/archive/1/419382/100/0/threaded