"file viewer" is just another remote file upload vulnerability, it allows you to upload .html .txt and .jpg files,
for shell uploading try .php.jpg or php shell uploading with extention changing [ Tamper data or Live Http headers]
Dork : "file viewer for uploader"
and "File viewer for Uploader (c) 2003 by Dirk Paehl"Goto
Google or any other search engine and type the dork ""file viewer for
uploader" now select site from there,...
