CVE-2025-66079 identifies a missing authorization vulnerability in the Gutenverse Form plugin developed by Jegstudio, affecting versions up to and including 2.2.0. The vulnerability arises from incorrectly configured access control mechanisms that fail to properly restrict certain actions to authorized users only. Specifically, users with limited privileges (requiring at least some authenticated access) can exploit this flaw to perform unauthorized modifications, compromising the integrity of form data or configurations. The vulnerability does not expose confidential information nor does it allow denial of service, but it enables integrity violations by unauthorized data changes. The CVSS v3.1 base score is 6.5, reflecting network attack vector, low attack complexity, required privileges, no user interaction, and impact limited to integrity. No known exploits have been reported in the wild, and no official patches have been linked yet, indicating that the vulnerability is newly disclosed. The plugin is commonly used in WordPress environments to manage forms, making it a relevant target for attackers seeking to manipulate form data or configurations. The lack of proper authorization checks suggests a design or implementation flaw in the plugin’s access control logic, which could be exploited by authenticated users with limited roles to escalate their capabilities or alter data beyond their permissions.

For European organizations, exploitation of this vulnerability could lead to unauthorized modification of form data or configurations managed by Gutenverse Form, potentially undermining data integrity and trustworthiness of collected information. This could affect business processes relying on accurate form submissions, such as customer inquiries, registrations, or feedback. While confidentiality and availability are not directly impacted, integrity breaches can have downstream effects including compliance violations (e.g., GDPR if data is altered improperly), reputational damage, and operational disruptions. Organizations using Gutenverse Form in sectors like e-commerce, public services, or healthcare may face increased risks due to the critical nature of form data. Attackers with limited authenticated access could leverage this vulnerability to escalate privileges or manipulate data, potentially facilitating further attacks or fraud. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as threat actors often develop exploits rapidly after public disclosure.

Organizations should immediately review user roles and permissions within their WordPress environments to ensure the principle of least privilege is enforced, limiting access to the Gutenverse Form plugin features only to trusted users. Monitoring and logging of form-related activities should be enhanced to detect unusual modifications or access patterns. Administrators should stay alert for official patches or updates from Jegstudio and apply them promptly once released. In the interim, consider disabling or restricting access to the Gutenverse Form plugin if feasible, especially for users with lower privilege levels. Employ web application firewalls (WAFs) with custom rules to detect and block suspicious requests targeting form modification endpoints. Conduct regular security audits and penetration testing focusing on authorization controls within WordPress plugins. Additionally, educate users about the risks of privilege misuse and enforce strong authentication mechanisms to reduce the likelihood of compromised accounts being used to exploit this vulnerability.