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The Database for CF7 plugin for WordPress is vulnerable to stored Cross-Site Scripting (XSS) via Array Form Field Values, allowing unauthenticated attackers to inject arbitrary web scripts by sending specially crafted array-structured input to the Contact Form 7 REST API endpoint /wp-json/contact-form-7/v1/contact-forms/{id}/feedback, which are insufficiently sanitized and executed when a user accesses an affected page.