CVE-2025-3580 is an access control vulnerability identified in Grafana OSS affecting multiple recent versions (from 10.4.18 through 12.0.0). The flaw resides in the DELETE /api/org/users/ API endpoint, which allows an Organization administrator to permanently delete the Server administrator account under certain conditions. Specifically, exploitation requires the presence of an Organization administrator and that the Server administrator is either not assigned to any organization or belongs to the same organization as the Organization administrator. This vulnerability stems from improper authorization checks (CWE-284) that fail to restrict Organization administrators from deleting higher-privileged Server administrator accounts. The impact is severe: if the sole Server administrator is deleted, the Grafana instance loses all super-user permissions, rendering it unmanageable. This results in a complete loss of administrative control over the monitoring and visualization platform, affecting all users, organizations, and teams configured within the instance. Although the CVSS v3.1 score is rated medium (5.5) due to the requirement of high privileges (Organization admin) and no user interaction, the potential for total administrative lockout elevates the operational risk significantly. No known exploits are reported in the wild yet, and no patches are linked in the provided data, indicating that remediation may still be pending or in progress. Grafana is widely used for infrastructure and application monitoring, making this vulnerability critical in environments relying on it for operational visibility and alerting.

For European organizations, the impact of this vulnerability can be substantial. Grafana is commonly deployed in enterprises, government agencies, and critical infrastructure sectors across Europe for monitoring IT systems, networks, and industrial processes. Loss of administrative control due to deletion of the Server administrator account can lead to prolonged downtime or inability to manage alerts and dashboards, severely hampering incident response and operational awareness. This could indirectly affect service availability, compliance with regulatory requirements (such as GDPR for data protection), and overall cybersecurity posture. Organizations with complex multi-tenant Grafana setups or those relying on a single Server administrator account are particularly vulnerable. The inability to restore administrative access quickly could also increase the risk of further exploitation or operational disruption. Given the central role of Grafana in observability stacks, this vulnerability could impact sectors such as finance, healthcare, energy, and public administration across Europe.

To mitigate this vulnerability, European organizations should: 1) Immediately audit Grafana user roles and ensure multiple Server administrator accounts exist to avoid single points of failure. 2) Restrict Organization administrator privileges strictly and review their necessity, minimizing the number of users with this role. 3) Implement strict access controls and monitoring on the DELETE /api/org/users/ endpoint, including API request logging and anomaly detection to identify unauthorized deletion attempts. 4) Apply the latest Grafana updates and patches as soon as they become available from the vendor to address this vulnerability. 5) Establish robust backup and recovery procedures for Grafana configurations and user accounts to restore administrative access if compromised. 6) Consider network segmentation and firewall rules to limit access to Grafana management interfaces to trusted administrators only. 7) Engage in proactive incident response planning specifically for Grafana administrative account compromise scenarios. These steps go beyond generic advice by focusing on role management, endpoint monitoring, and operational resilience tailored to this vulnerability's characteristics.