CVE-2025-11958 is a vulnerability identified in the Devolutions Server product, specifically affecting versions 2025.2.15.0 and earlier. The root cause is improper input validation in the Security Dashboard's ignored-tasks API, which fails to properly sanitize or validate incoming requests. This flaw allows an authenticated user with high privileges to craft a malicious request that causes a denial of service (DoS) condition, effectively disrupting the availability of the Security Dashboard component. The Security Dashboard is a critical interface for monitoring and managing security tasks, so its unavailability can hinder security operations and incident response. The vulnerability does not require user interaction beyond authentication and can be exploited remotely over the network, increasing its risk profile. The CVSS score of 5.1 (medium severity) reflects the limited impact on confidentiality and integrity but notable impact on availability. No patches or exploits are currently publicly available, but the vulnerability is officially published and should be addressed promptly. This issue is categorized under CWE-20 (Improper Input Validation), a common software weakness that can lead to various security issues including DoS. The vulnerability highlights the need for rigorous input validation and secure API design in security management platforms.

For European organizations, the primary impact of CVE-2025-11958 is the potential denial of service to the Security Dashboard in Devolutions Server, which could disrupt security monitoring and management activities. This disruption can delay detection and response to other security incidents, increasing overall risk exposure. Organizations relying heavily on Devolutions Server for remote access management, privileged access management, or security task automation may experience operational downtime or degraded security posture. Critical sectors such as finance, healthcare, energy, and government agencies in Europe that utilize Devolutions products could face increased risk of operational disruption. Although the vulnerability requires authenticated access with high privileges, insider threats or compromised credentials could be leveraged to exploit this flaw. The lack of known exploits in the wild reduces immediate risk but does not eliminate the potential for targeted attacks. Overall, the impact is moderate but significant enough to warrant timely mitigation to maintain security operations continuity.

1. Restrict access to the Devolutions Server Security Dashboard and its APIs to only trusted and necessary personnel, enforcing the principle of least privilege. 2. Implement strong authentication mechanisms and monitor for unusual access patterns or privilege escalations that could indicate misuse. 3. Apply network segmentation and firewall rules to limit exposure of the Devolutions Server interfaces to internal networks or VPNs only. 4. Monitor logs and alerts for anomalous or malformed requests targeting the ignored-tasks API to detect potential exploitation attempts. 5. Once available, promptly apply official patches or updates from Devolutions addressing this vulnerability. 6. Conduct regular security assessments and input validation testing on APIs to identify and remediate similar weaknesses proactively. 7. Educate administrators and users with high privileges on secure usage practices and the risks of crafted requests. 8. Consider implementing Web Application Firewalls (WAF) or API gateways that can filter and block malformed or suspicious API requests targeting the Security Dashboard.