Unrestricted file upload vulnerability in admin.php in MCshoutbox 1.1 allows remote authenticated users to execute arbitrary code by uploading a file with an executable extension, then accessing it via a direct request to the file in smilies/.

Cross-site scripting (XSS) vulnerability in admin_login.php in MCshoutbox 1.1 allows remote attackers to inject arbitrary web script or HTML via the loginerror parameter.

Multiple SQL injection vulnerabilities in scr_login.php in MCshoutbox 1.1, when magic_quotes_gpc is disabled, allow remote attackers to execute arbitrary SQL commands via the (1) username and (2) password parameters.