CVE-2025-63001 is a vulnerability classified under CWE-862 (Missing Authorization) affecting the nicdark Hotel Booking software versions up to 3.8. The flaw stems from improperly configured access control mechanisms that fail to enforce authorization checks on certain operations or endpoints. This allows an unauthenticated attacker to perform actions that should be restricted, potentially modifying data or application state without permission. The vulnerability is remotely exploitable over the network without requiring any user privileges or interaction, increasing its accessibility to attackers. However, the impact is limited to integrity as confidentiality and availability are not affected. The CVSS v3.1 base score is 5.3, reflecting a medium severity rating. No patches or fixes have been released at the time of publication, and no known exploits have been observed in the wild. The vulnerability highlights the importance of correctly implementing and validating access control policies in web applications, especially those handling sensitive booking and customer data in the hospitality sector.

For European organizations, particularly those in the hospitality and travel industries using nicdark Hotel Booking software, this vulnerability poses a risk of unauthorized data modification, which could lead to booking errors, fraudulent reservations, or manipulation of pricing and availability information. While it does not directly compromise customer data confidentiality or system availability, integrity breaches can damage business reputation, cause financial losses, and disrupt operations. Attackers exploiting this flaw could undermine trust in the booking platform and potentially leverage the unauthorized access as a foothold for further attacks. Given the importance of tourism in many European economies, the impact could be significant in countries with high volumes of hotel bookings and online reservations. The lack of authentication requirement and ease of exploitation increase the urgency for affected organizations to address this vulnerability promptly.

Organizations should immediately review and strengthen access control configurations within the nicdark Hotel Booking software. This includes implementing strict authorization checks on all sensitive operations and endpoints to ensure only authorized users can perform modifications. Conduct thorough code audits and penetration testing focused on access control mechanisms. Monitor application logs for unusual or unauthorized activities indicative of exploitation attempts. Until an official patch is released, consider deploying web application firewalls (WAFs) with custom rules to block suspicious requests targeting vulnerable endpoints. Limit network exposure of the booking system by restricting access to trusted IP ranges or VPNs where feasible. Engage with the vendor for timely updates and apply patches as soon as they become available. Additionally, educate staff on recognizing potential exploitation signs and maintaining robust incident response procedures.