CVE-2025-63001 identifies a Missing Authorization vulnerability (CWE-862) in the nicdark Hotel Booking software, affecting versions up to 3.8. This vulnerability arises from incorrectly configured access control mechanisms that fail to enforce proper authorization checks on certain operations. As a result, remote attackers can exploit this flaw over the network without requiring any privileges or user interaction to perform unauthorized actions that impact data integrity. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N) indicates that the attack can be launched remotely with low complexity, no privileges, and no user interaction, affecting the integrity of the system but not confidentiality or availability. The vulnerability could allow attackers to modify booking details, reservations, or other critical data managed by the hotel booking system, potentially leading to fraudulent bookings or data corruption. No patches or fixes are currently listed, and no known exploits have been reported in the wild, but the risk remains significant due to the ease of exploitation and the critical nature of booking data. The vulnerability was reserved in late October 2025 and published at the end of December 2025, suggesting it is a recent discovery. Organizations using nicdark Hotel Booking should urgently assess their exposure and implement access control reviews and mitigations.

For European organizations, especially those in the hospitality and travel sectors, this vulnerability poses a risk to the integrity of booking and reservation data. Unauthorized modification of bookings can lead to financial losses, reputational damage, and operational disruptions. Since the vulnerability does not impact confidentiality or availability directly, data leakage or denial of service are less likely, but the integrity compromise can still undermine trust in the booking system. Attackers could manipulate reservations to cause overbooking, cancellations, or fraudulent bookings, impacting customer satisfaction and business operations. Given the network-exploitable nature without authentication, attackers could launch attacks remotely, increasing the threat surface. European countries with large tourism industries and widespread adoption of nicdark Hotel Booking software are particularly vulnerable. The absence of known exploits provides a window for proactive mitigation, but the medium severity score indicates that organizations should not delay remediation efforts.

1. Conduct a thorough audit of all access control mechanisms within the nicdark Hotel Booking application, focusing on authorization checks for all sensitive operations such as booking creation, modification, and cancellation. 2. Implement strict role-based access control (RBAC) policies ensuring that only authorized users can perform critical actions. 3. Apply input validation and enforce server-side authorization checks to prevent unauthorized requests from being processed. 4. Monitor application logs for unusual or unauthorized access patterns that may indicate exploitation attempts. 5. If patches become available from nicdark, prioritize their deployment in all affected environments. 6. Consider deploying web application firewalls (WAFs) with custom rules to detect and block unauthorized access attempts targeting booking modification endpoints. 7. Educate staff and administrators on the importance of secure configuration and regular security reviews of the booking system. 8. Isolate the booking system network segment and restrict access to trusted IP addresses where feasible to reduce exposure. 9. Regularly back up booking data to enable recovery in case of data integrity compromise. 10. Engage with nicdark support or security advisories to stay informed about updates or patches addressing this vulnerability.