CVE-2025-67917 is a missing authorization vulnerability identified in the shinetheme Traveler product, affecting all versions up to and including 3.2.6. The vulnerability stems from incorrectly configured access control security levels, allowing attackers with low privileges (PR:L) to bypass authorization checks and gain unauthorized access to sensitive functions or data. The CVSS 3.1 base score of 8.1 reflects a high severity, with an attack vector over the network (AV:N), low attack complexity (AC:L), no user interaction required (UI:N), and unchanged scope (S:U). The impact on confidentiality and integrity is high (C:H/I:H), while availability is not affected (A:N). This means attackers can read or modify sensitive information without disrupting service availability. The vulnerability does not require user interaction, increasing the risk of automated exploitation once a working attack method is developed. Although no known exploits are currently reported in the wild, the lack of patches or mitigations at disclosure heightens the urgency for organizations to assess their exposure. The root cause is a failure in enforcing proper authorization checks on critical operations within the Traveler application, which is commonly used for travel management and booking services. This flaw could allow attackers to access or manipulate sensitive customer or operational data, potentially leading to data breaches, fraud, or reputational damage.

For European organizations, the impact of CVE-2025-67917 can be significant, especially those in the travel, hospitality, and related sectors relying on shinetheme Traveler for managing bookings and customer information. Unauthorized access could lead to exposure of personal identifiable information (PII), travel itineraries, payment details, and internal operational data. This compromises customer privacy and may violate GDPR regulations, leading to legal and financial penalties. Integrity breaches could allow attackers to alter bookings or manipulate data, causing operational disruptions and loss of trust. Although availability is not directly impacted, the indirect effects of data manipulation or breach notifications can disrupt business continuity. The network-based attack vector and lack of user interaction requirement increase the risk of widespread exploitation if the vulnerability is weaponized. Organizations with interconnected systems may face lateral movement risks, amplifying the threat. Given the high confidentiality and integrity impact, European entities must prioritize detection and remediation to avoid severe regulatory and reputational consequences.

1. Conduct an immediate audit of access control configurations within shinetheme Traveler to identify and remediate any missing or improperly configured authorization checks. 2. Implement strict role-based access controls (RBAC) limiting user privileges to the minimum necessary, ensuring no low-privilege users can access sensitive functions. 3. Network segmentation should be enforced to isolate Traveler systems from broader corporate networks, reducing attack surface exposure. 4. Deploy enhanced monitoring and alerting for unusual access patterns or privilege escalations within Traveler, leveraging SIEM tools with tailored rules. 5. Until an official patch is released, consider applying virtual patching via web application firewalls (WAF) to block suspicious requests targeting known vulnerable endpoints. 6. Educate administrators and users about the vulnerability and encourage immediate reporting of anomalies. 7. Maintain up-to-date backups of Traveler data to enable recovery in case of data integrity compromise. 8. Engage with the vendor for timely updates and patches, and plan for rapid deployment once available. 9. Review and test incident response plans specifically for breaches involving Traveler systems to ensure readiness.