MOStlyCE before 2.4, as used in Mambo 4.6.3 and earlier, allows remote attackers to obtain sensitive information via certain requests to mambots/editors/mostlyce/jscripts/tiny_mce/filemanager/connectors/php/connector.php, which reveals the installation path in an error message.

Cross-site scripting (XSS) vulnerability in mambots/editors/mostlyce/jscripts/tiny_mce/filemanager/connectors/php/connector.php in MOStlyCE before 2.4, as used in Mambo 4.6.3 and earlier, allows remote attackers to inject arbitrary web script or HTML via the Command parameter.

Cross-site request forgery (CSRF) vulnerability in administrator/index2.php in MOStlyCE before 2.4, as used in Mambo 4.6.3 and earlier, allows remote attackers to hijack the authentication of administrators for requests that add new administrator accounts via the save task in a com_users action, as demonstrated using a separate XSS vulnerability in mambots/editors/mostlyce/jscripts/tiny_mce/filemanager/connectors/php/connector.php.

The Image Manager in MOStlyCE before 2.4, as used in Mambo 4.6.3 and earlier, allows remote attackers to rename arbitrary files and cause a denial of service via modified file[NewFile][name], file[NewFile][tmp_name], and file[NewFile][size] parameters in a FileUpload command, which are used to modify equivalent variables in $_FILES that are accessed when the is_uploaded_file check fails.