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CVE-2026-6455

HIGH 8.1 CVSS 3.1
Published
May 28, 2026
Last modified
June 17, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-352
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

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).

Affected WordPress components

  • WP Contact Form 7 DB Handler Plugin · wp-contact-form-7-db-handler
    Confirmed match Active
    Up to and including 3.0
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • yudiz WP Contact Form 7 DB Handler — Up to and including 3.0

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/tags/3.0/include/form-inner-page-class.php#L589
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/tags/3.0/include/form-inner-page-class.php#L605
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/tags/3.0/include/form-inner-page-class.php#L607
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/tags/3.0/include/form-inner-page-class.php#L615
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/trunk/include/form-inner-page-class.php#L589
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/trunk/include/form-inner-page-class.php#L605
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/trunk/include/form-inner-page-class.php#L607
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-contact-form-7-db-handler/trunk/include/form-inner-page-class.php#L615
  • plugins.trac.wordpress.org 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=
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/96cdba03-7385-4374-915d-061be0276a95?source=cve
  • nvd.nist.gov Official NVD record