WordPress Site Editor 1.1.1 Local File Inclusion

Risk: Medium
Local: No
Remote: Yes

CVSS Base Score: 5/10
Impact Subscore: 2.9/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: None
Availability impact: None

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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