CVE-2026-6455
HIGH SEVERITYCVSS Score & Metrics
Base Score
8.1 / 10
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Vulnerability Description
The WP Contact Form 7 DB Handler plugin for WordPress is vulnerable to Cross-Site Request Forgery leading to Arbitrary File Deletion via SQL Injection and PHP Object Injection in versions up to and including 3.0. This is due to a missing nonce verification in the process_bulk_action() function, the nonce check is only executed when _wpnonce is present in the POST body, allowing it to be trivially bypassed by omitting the field, combined with the use of an unsanitized, unparameterized user-supplied value in a numeric SQL context (WHERE ID = $ID) and the unsafe deserialization of the query result's post_content field. An attacker can craft a CSRF page that tricks a logged-in administrator into triggering a UNION-based SQL injection payload (using CHAR() to avoid esc_sql quote-escaping) that returns a malicious serialized PHP array as post_content; upon deserialization, array values associated with keys containing 'ys_cfdbh_file' are used as file paths appended to the uploads directory path without any path traversal validation, and then passed to wp_delete_file(), allowing the attacker to delete arbitrary files on the server (e.g., wp-config.php, system files).
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-352
Source
NVD
External References
- https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/tags/3.0/include/form-inner-page-class.php#L589
- https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/tags/3.0/include/form-inner-page-class.php#L605
- https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/tags/3.0/include/form-inner-page-class.php#L607
- https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/tags/3.0/include/form-inner-page-class.php#L615
- https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/trunk/include/form-inner-page-class.php#L589
- https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/trunk/include/form-inner-page-class.php#L605
- https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/trunk/include/form-inner-page-class.php#L607
- https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/trunk/include/form-inner-page-class.php#L615
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3520240%40wp-contact-form-7-db-handler&new=3520240%40wp-contact-form-7-db-handler&sfp_email=&sfph_mail=
- https://www.wordfence.com/threat-intel/vulnerabilities/id/96cdba03-7385-4374-915d-061be0276a95?source=cve
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