Unrestricted file upload in the mcpuk file editor (atk/attributes/fck/editor/filemanager/browser/mcpuk/connectors/php/config.php) in Achievo 1.2.0 through 1.3.2 allows remote attackers to execute arbitrary code by uploading a file with .php followed by a safe extension, then accessing it via a direct request to the file in the Achievo root directory. NOTE: this is only a vulnerability in environments that support multiple extensions, such as Apache with the mod_mime module enabled.
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