WordPress Site Editor 1.1.1 Local File Inclusion

`Product: Site Editor Wordpress Plugin - https://wordpress.org/plugins/site-editor/  
Vendor: Site Editor  
Tested version: 1.1.1  
CVE ID: CVE-2018-7422  
  
** CVE description **  
A Local File Inclusion vulnerability in the Site Editor plugin through 1.1.1 for WordPress allows remote attackers to retrieve arbitrary files via the ajax_path parameter to editor/extensions/pagebuilder/includes/ajax_shortcode_pattern.php.  
  
** Technical details **  
In site-editor/editor/extensions/pagebuilder/includes/ajax_shortcode_pattern.php:5, the value of the ajax_path parameter is used for including a file with PHPs require_once(). This parameter can be controlled by an attacker and is not properly sanitized.  
  
Vulnerable code:  
if( isset( $_REQUEST['ajax_path'] ) && is_file( $_REQUEST['ajax_path'] ) && file_exists( $_REQUEST['ajax_path'] ) ){  
require_once $_REQUEST['ajax_path'];  
}  
  
https://plugins.trac.wordpress.org/browser/site-editor/trunk/editor/extensions/pagebuilder/includes/ajax_shortcode_pattern.php?rev=1640500#L5  
  
By providing a specially crafted path to the vulnerable parameter, a remote attacker can retrieve the contents of sensitive files on the local system.  
  
** Proof of Concept **  
http://<host>/wp-content/plugins/site-editor/editor/extensions/pagebuilder/includes/ajax_shortcode_pattern.php?ajax_path=/etc/passwd  
  
** Solution **  
No fix available yet.  
  
** Timeline **  
03/01/2018: author contacted through siteeditor.org's contact form; no reply  
16/01/2018: issue report filled on the public GitHub page with no technical details  
18/01/2018: author replies and said he replied to our e-mail 8 days ago (could not find the aforementioned e-mail at all); author sends us "another" e-mail  
19/01/2018: report sent; author says he will fix this issue "very soon"  
31/01/2018: vendor contacted to ask about an approximate release date and if he needs us to postpone the disclosure; no reply  
14/02/2018: WP Plugins team contacted; no reply  
06/03/2018: vendor contacted; no reply  
07/03/2018: vendor contacted; no reply  
15/03/2018: public disclosure  
  
** Credits **  
Vulnerability discovered by Nicolas Buzy-Debat working at Orange Cyberdefense Singapore (CERT-LEXSI).  
  
--  
Best Regards,  
  
Nicolas Buzy-Debat  
Orange Cyberdefense Singapore (CERT-LEXSI)  
_________________________________________________________________________________________________________________________  
  
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