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.
phpCOIN 1.2.3 and earlier stores messages based upon e-mail addresses, which allows remote authenticated users to read messages for other users by adding the sender's e-mail address as an "additional contact".
Directory traversal vulnerability in auxpage.php for phpCOIN 1.2.1b and earlier allows remote attackers to read arbitrary files via the page parameter.