CVE-2025-13643 identifies a missing authorization vulnerability (CWE-862) in MongoDB Server versions 7.0 prior to 7.0.26 and 8.0 prior to 8.0.14. The flaw allows a user with limited privileges on a MongoDB cluster to terminate queries executed by other users. This occurs because the server does not properly enforce authorization checks on the query termination operation, enabling privilege escalation in terms of operational impact. Although the attacker cannot access or modify data, they can disrupt ongoing queries, causing a denial of service (DoS) effect by preventing some queries from completing successfully. The vulnerability requires network access (AV:N) and low privileges (PR:L), but no user interaction (UI:N). The attack complexity is high (AC:H), meaning exploitation is not trivial but feasible under certain conditions. The scope is unchanged (S:U), affecting only the targeted MongoDB instance. The CVSS v3.1 base score is 3.1, reflecting low severity primarily due to limited impact on availability and no impact on confidentiality or integrity. No public exploits have been reported, indicating limited active exploitation. The vulnerability affects MongoDB Server versions widely used in enterprise environments, making it relevant for organizations relying on MongoDB for critical data processing and analytics workloads. The issue was published on November 25, 2025, and no official patches are linked in the provided data, but MongoDB typically releases updates addressing such vulnerabilities promptly.

For European organizations, the primary impact of CVE-2025-13643 is potential denial of service caused by unauthorized termination of database queries. This can disrupt business operations that depend on continuous and reliable database access, such as financial services, e-commerce platforms, healthcare systems, and public sector applications. Although the vulnerability does not expose sensitive data or allow data modification, the interruption of query execution can degrade service quality, cause transaction failures, and impact user experience. Organizations with multi-tenant MongoDB deployments or shared clusters are at higher risk, as malicious or compromised users with limited privileges could disrupt other users’ queries. The impact is more pronounced in environments with high query volumes or real-time data processing requirements. Given the low CVSS score and absence of known exploits, the immediate risk is moderate; however, unpatched systems could become targets for opportunistic attackers aiming to cause disruption. The vulnerability also highlights the importance of strict privilege management and monitoring in database environments.

To mitigate CVE-2025-13643, European organizations should prioritize upgrading MongoDB Server to versions 7.0.26 or later and 8.0.14 or later once patches are available. In the interim, organizations should audit and minimize user privileges, ensuring that only trusted users have the ability to terminate queries. Implement role-based access control (RBAC) policies that restrict query termination capabilities to administrative roles. Monitor database logs for unusual query termination activities that could indicate exploitation attempts. Employ network segmentation and firewall rules to limit access to MongoDB instances to authorized personnel and systems only. Consider implementing query timeout and retry mechanisms in application logic to reduce the impact of unexpected query terminations. Regularly review MongoDB security advisories and apply security updates promptly. Additionally, conduct penetration testing and vulnerability assessments focused on authorization controls within MongoDB deployments to detect similar weaknesses.