CVE-2025-39376 is a Missing Authorization vulnerability (CWE-862) identified in the QuanticaLabs Car Park Booking System plugin for WordPress. This vulnerability affects all versions up to 2.6 of the plugin. The core issue is that the plugin fails to properly enforce authorization checks on certain actions or resources, allowing users with limited privileges (requiring at least some level of authentication) to perform actions or access data beyond their intended permissions. The CVSS 3.1 base score is 4.3 (medium severity), with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), requiring privileges (PR:L), no user interaction (UI:N), unchanged scope (S:U), no confidentiality impact (C:N), low integrity impact (I:L), and no availability impact (A:N). This means an attacker with some authenticated access can exploit the vulnerability remotely without user interaction to cause limited integrity impact, such as modifying data or booking records improperly. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability is significant because it undermines the authorization controls of a booking system that manages parking reservations, potentially allowing unauthorized modification or manipulation of bookings, which could disrupt business operations or cause financial or reputational damage. Since the plugin is integrated into WordPress, a widely used CMS, the attack surface is broad, especially for organizations relying on this plugin for parking management.

For European organizations, the impact of this vulnerability can be material depending on their reliance on the QuanticaLabs Car Park Booking System plugin. Organizations such as universities, hospitals, corporate campuses, or municipal parking authorities using this plugin could face unauthorized modifications to booking data, leading to operational disruptions, double bookings, or denial of legitimate parking access. While the confidentiality impact is negligible, the integrity impact could result in incorrect booking records, financial losses from misallocated parking spaces, and reputational harm if customers or employees are affected. Additionally, if attackers manipulate booking data, it could be leveraged for further social engineering or physical security bypass attempts. The medium severity score suggests the threat is moderate but should not be ignored, especially in sectors where parking management is critical to daily operations. European organizations must consider the GDPR implications if any personal data related to bookings is improperly accessed or altered, potentially leading to compliance issues.

1. Immediate mitigation should include restricting access to the Car Park Booking System plugin functionalities to only trusted and necessary user roles, minimizing the number of users with authenticated access. 2. Monitor and audit logs related to booking modifications to detect unusual or unauthorized activities promptly. 3. Implement additional access control layers at the WordPress level, such as role-based access control plugins or web application firewalls (WAFs), to enforce stricter authorization policies. 4. Until an official patch is released, consider disabling or limiting the plugin's use if feasible, or isolating it on segmented network zones to reduce exposure. 5. Regularly check for updates from QuanticaLabs and apply patches as soon as they become available. 6. Conduct internal penetration testing focusing on authorization controls within the plugin to identify any other potential weaknesses. 7. Educate administrators and users about the risks of privilege misuse and enforce strong authentication mechanisms to reduce the risk of compromised credentials being exploited.