CVE-2025-11958 is a security vulnerability classified under CWE-20 (Improper Input Validation) affecting Devolutions Server versions 2025.2.15.0 and earlier. The flaw exists in the Security Dashboard's ignored-tasks API, which fails to properly validate input parameters. An authenticated attacker can craft a malicious request that exploits this input validation weakness to cause a denial of service (DoS) condition, effectively disrupting the Security Dashboard's operation. The Security Dashboard is a critical component used for monitoring security events and managing tasks within the Devolutions Server environment. The vulnerability requires the attacker to be authenticated, meaning they must have valid credentials, but does not require elevated privileges beyond that. No public exploits or active exploitation campaigns have been reported to date. The lack of a CVSS score indicates the vulnerability is newly disclosed and pending further assessment. The improper input validation could lead to resource exhaustion or application crashes, impacting availability. Since the vulnerability affects a security monitoring component, its exploitation could delay detection and response to other security incidents. Devolutions Server is widely used for privileged access management and remote connection management, making this vulnerability relevant to organizations relying on these services. The absence of patches at the time of disclosure necessitates interim mitigations such as restricting API access and monitoring for suspicious activity.

The primary impact of CVE-2025-11958 is on the availability of the Security Dashboard within Devolutions Server, which could impair an organization's ability to monitor and respond to security events effectively. For European organizations, especially those in sectors like finance, healthcare, government, and critical infrastructure that rely heavily on privileged access management tools, this disruption could increase risk exposure by delaying incident detection and response. The denial of service could also affect operational continuity if the Security Dashboard is integral to daily security operations. Since exploitation requires authentication, insider threats or compromised credentials pose a significant risk vector. The vulnerability does not directly compromise confidentiality or integrity but indirectly increases risk by reducing visibility into security posture. Organizations with large-scale deployments or centralized security management using Devolutions Server are more vulnerable to operational impact. The lack of known exploits reduces immediate risk, but the potential for future exploitation remains. European entities with stringent compliance requirements may face regulatory scrutiny if this vulnerability leads to security incidents.

1. Monitor Devolutions' official channels for patches addressing CVE-2025-11958 and apply them promptly once available. 2. Restrict access to the Security Dashboard's ignored-tasks API to only trusted and necessary authenticated users, using network segmentation and access control lists. 3. Implement strong authentication mechanisms and enforce least privilege principles to minimize the risk of credential compromise. 4. Enable detailed logging and monitoring of API requests to detect anomalous or malformed inputs indicative of exploitation attempts. 5. Conduct regular security audits and penetration testing focused on input validation and API security within Devolutions Server deployments. 6. Consider deploying Web Application Firewalls (WAFs) or API gateways capable of input validation and filtering to block malicious requests targeting the ignored-tasks API. 7. Educate administrators and users about the risks of this vulnerability and encourage vigilance for unusual system behavior. 8. Develop and test incident response plans that include scenarios involving denial of service against security monitoring tools.