Overview
The Common Vulnerabilities and Exposures (CVE) system has identified a significant security flaw in Devolutions Server versions 2025.1.7.0 and earlier. This vulnerability, tagged as CVE-2025-4433, is a glaring example of improper access control within user group management, allowing potential privilege escalation by non-admin users. This flaw is particularly concerning as it affects a broad range of systems and can lead to serious consequences like system compromise or data leakage if exploited.
The criticality of this vulnerability is underscored by its CVSS Severity Score of 8.8, indicating a high level of risk. Organizations running affected versions of Devolutions Server must prioritize addressing this issue to prevent potential security breaches.
Vulnerability Summary
CVE ID: CVE-2025-4433
Severity: High (8.8 CVSS Score)
Attack Vector: Network
Privileges Required: Low
User Interaction: Required
Impact: System compromise or data leakage
Affected Products
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Product | Affected Versions
Devolutions Server | 2025.1.7.0 and earlier
How the Exploit Works
The CVE-2025-4433 vulnerability arises from improper access control within Devolutions Server’s user group management feature. Specifically, a non-administrative user with both “User Management” and “User Group Management” permissions can exploit this flaw to escalate their privileges. They can add themselves or other users to groups with administrative privileges, thereby gaining unauthorized access to administrative functions and sensitive data.
Conceptual Example Code
Here is a conceptual example of how the vulnerability might be exploited. This pseudocode represents a malicious user adding themselves to an administrative group.
POST /api/usergroup/add HTTP/1.1
Host: devolutions-server.example.com
Content-Type: application/json
{
"userID": "malicious_user_id",
"groupID": "admin_group_id"
}This request would add the malicious user to the admin group, granting them administrative rights and enabling them to potentially compromise the system or leak sensitive data.
To mitigate this vulnerability, it is highly recommended that organizations apply the vendor patch as soon as it becomes available. In the meantime, using Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation strategy.