Unrestricted file upload vulnerability in editor/filemanager/browser/default/connectors/php/connector.php in FCKeditor 2.2, as used in Falt4 CMS, Nuke ET, and other products, allows remote attackers to execute arbitrary code by creating a file with PHP sequences preceded by a ZIP header, uploading this file via a FileUpload action with the application/zip content type, and then accessing this file via a direct request to the file in UserFiles/File/, probably a related issue to CVE-2005-4094. NOTE: some of these details are obtained from third party information.

Cross-site scripting (XSS) vulnerability in the "Basic Toolbar Selection" in FCKEditor allows remote attackers to execute arbitrary JavaScript via the javascript: URI in the (1) href or (2) onmouseover attribute of the A HTML tag.

editor/filemanager/upload/php/upload.php in FCKeditor before 2.3 Beta, when the upload feature is enabled, does not verify the Type parameter, which allows remote attackers to upload arbitrary file types. NOTE: It is not clear whether this is related to CVE-2006-0658.

Multiple directory traversal vulnerabilities in connector.php in FCKeditor 2.0 FC, as used in products such as RunCMS, allow remote attackers to list and create arbitrary directories via a .. (dot dot) in the CurrentFolder parameter to (1) GetFoldersAndFiles and (2) CreateFolder.

Incomplete blacklist vulnerability in connector.php in FCKeditor 2.0 and 2.2, as used in products such as RunCMS, allows remote attackers to upload and execute arbitrary script files by giving the files specific extensions that are not listed in the Config[DeniedExtensions][File], such as .php.txt.