[ 2 ] Arbitrary File Upload through TinyMCE (plugins/filemanager)
Webster 5.x has a built-in WYSIWYG Editor, that is TinyMCE. The attacker can upload file through the TinyMCE File Manager.
It can be found in tiny_mce/plugins/filemanager.
Poc : http://[Site]/[Path]/tiny_mce/plugins/filemanager/InsertFile/insert_file.php
Example the target is http://server/
Change the url to http://server/tiny_mce/plugins/filemanager/InsertFile/insert_file.php
Pic #1 : http://i40.tinypic.com/117z390.png
Then tick : Insert filetype icon, Insert file size & Insert file modification date.
Click upload and wait until the file sent to the server.
Pic #2 : http://i39.tinypic.com/2wluaon.png
Pic #3 : http://i40.tinypic.com/2uh0fir.png
If the file was successfully uploaded, check in the /test-images/ directory.