CVE-2024-51666 is a security vulnerability classified under CWE-862, indicating a Missing Authorization issue in the Automattic Tours product. This vulnerability affects versions up to 1.0.0, though the exact affected versions are not specified ('n/a'). Missing Authorization means that the application fails to properly verify whether a user has the necessary permissions to perform certain actions or access specific resources. In this case, the flaw allows users with some level of privileges (as indicated by the CVSS vector requiring low privileges) to perform actions or access data beyond their authorized scope. The CVSS 3.1 base score is 4.3 (medium severity), with the vector AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N, meaning the vulnerability is remotely exploitable over the network with low attack complexity, requires low privileges, no user interaction, and impacts integrity but not confidentiality or availability. The scope is unchanged, so the impact is limited to the vulnerable component. No known exploits are currently reported in the wild, and no patches are linked yet. The vulnerability was published in May 2025 and is tracked by Patchstack and CISA enrichment, indicating it is recognized by US cybersecurity authorities. The missing authorization could allow an attacker with limited access to modify data or perform unauthorized actions within the Tours application, potentially leading to data integrity issues or unauthorized modifications within the system. Since the product is from Automattic, a company known for WordPress and related services, this vulnerability may affect websites or services using the Tours plugin or application component.

For European organizations using Automattic Tours, this vulnerability could lead to unauthorized modifications of data or configurations within the Tours application. Although it does not directly impact confidentiality or availability, the integrity compromise could disrupt business processes relying on accurate tour or event data, potentially causing reputational damage or operational inefficiencies. Organizations in sectors such as tourism, event management, or hospitality that use this product may face risks of unauthorized data tampering or manipulation. Given the remote exploitability and lack of required user interaction, attackers could automate exploitation attempts, increasing risk. However, the requirement for low privileges means attackers must already have some level of access, limiting exposure to internal threats or compromised accounts. The absence of known exploits in the wild reduces immediate risk but does not eliminate the need for proactive measures. European GDPR regulations emphasize data integrity and security, so organizations must address this vulnerability to maintain compliance and trust.

1. Implement strict access control policies and review user privileges regularly to ensure that users have only the minimum necessary permissions within the Tours application. 2. Monitor application logs for unusual activities or unauthorized access attempts related to Tours. 3. Apply principle of least privilege on all accounts interacting with the Tours product. 4. Since no patch is currently linked, coordinate with Automattic or the plugin vendor for timely updates or security advisories. 5. Consider deploying Web Application Firewalls (WAF) with custom rules to detect and block suspicious requests targeting the Tours application endpoints. 6. Conduct internal security assessments and penetration tests focusing on authorization checks within the Tours application to identify and remediate similar issues. 7. Educate administrators and users about the risks of privilege misuse and enforce strong authentication mechanisms to reduce the risk of account compromise. 8. If feasible, isolate the Tours application environment to limit the blast radius of potential exploitation.