{"cve":"CVE-2026-6455","nvd":{"published":"2026-05-28T08:16:36.477","modified":"2026-06-17T11:00:50.810","status":"Deferred","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).","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","score":8.1},"cwes":["CWE-352"],"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"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-6455","score":0.00248,"percentile":0.16121,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}