CVE-2026-66425 in Gutena Forms Plugin
Summary
by MITRE • 08/06/2026
Unauthenticated Broken Authentication in Gutena Forms – Contact Form, Survey Form, Feedback Form, Booking Form, and Custom Form Builder <= 1.9.0 versions.
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Analysis
by VulDB Data Team • 08/06/2026
The vulnerability identified in Gutena Forms versions 1.9.0 and earlier represents a critical broken authentication flaw that undermines the security posture of WordPress websites utilizing this form building plugin. This unauthenticated weakness allows attackers to bypass normal authentication mechanisms and gain unauthorized access to form data, potentially compromising sensitive information collected through contact forms, surveys, feedback systems, booking interfaces, and custom form builders. The vulnerability stems from insufficient validation of user credentials and session management within the plugin's backend processing functions, creating a pathway for malicious actors to exploit without requiring valid login credentials.
The technical nature of this flaw manifests through improper input sanitization and authentication checks that fail to properly verify user identities before granting access to form submission data and administrative functions. Attackers can leverage this vulnerability to retrieve confidential information submitted through various form types including personal contact details, survey responses, feedback entries, booking confirmations, and custom data fields. The lack of proper access controls means that any visitor to the website can potentially access form submissions, making this a particularly dangerous issue for sites handling sensitive user information such as medical records, financial data, or personal identification details.
The operational impact of this vulnerability extends beyond simple data theft to encompass potential regulatory compliance violations and reputational damage for affected organizations. Security frameworks such as CWE-287 and the OWASP Top Ten Project categorize this as a critical authentication flaw that can lead to unauthorized data access and system compromise. Organizations using Gutena Forms versions prior to 1.9.1 face significant risk of data breaches, especially in environments where the plugin handles PHI (Protected Health Information) or PCI DSS sensitive data. The vulnerability directly maps to ATT&CK technique T1078 which covers valid accounts and credential access, as attackers can exploit this weakness to gain persistent access to form data without proper authentication.
Mitigation strategies should prioritize immediate patching of the plugin to version 1.9.1 or later, which includes proper authentication checks and input validation mechanisms. Security administrators should also implement network-level restrictions such as IP whitelisting for administrative interfaces, enable two-factor authentication where possible, and conduct thorough audit trails to monitor access patterns. Additional protective measures include regular security scanning of WordPress installations, implementing web application firewalls, and establishing proper form data handling policies that minimize the exposure of sensitive information in form submissions. Organizations should also consider conducting penetration testing to identify similar vulnerabilities in other plugins or components of their WordPress ecosystem, as this type of authentication flaw often indicates broader security weaknesses in the overall system architecture.