CVE-2025-6741 in Server
Summary
by MITRE • 07/22/2025
Improper access control in secure message component in Devolutions Server allows an authenticated user to steal unauthorized entries via the secure message entry attachment feature
This issue affects the following versions :
* Devolutions Server 2025.2.2.0 through 2025.2.4.0 * Devolutions Server 2025.1.11.0 and earlier
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Analysis
by VulDB Data Team • 11/26/2025
The vulnerability identified as CVE-2025-6741 represents a critical access control flaw within the secure message component of Devolutions Server software. This weakness allows authenticated users to exploit the secure message entry attachment feature to gain unauthorized access to entries that should be restricted to specific authorized personnel. The issue stems from inadequate validation of user permissions when processing attachment requests, creating a path for privilege escalation and data exfiltration. The vulnerability affects multiple versions of the Devolutions Server platform, specifically targeting releases from 2025.2.2.0 through 2025.2.4.0 and all previous versions including 2025.1.11.0 and earlier, indicating a widespread impact across the product's release cycle.
The technical implementation of this flaw lies in the insufficient authorization checks within the secure message handling subsystem. When users access entry attachments through the secure message interface, the system fails to properly verify whether the requesting user possesses the necessary permissions to access the target entry. This improper access control mechanism creates a direct pathway for authenticated users to bypass normal access restrictions and retrieve confidential data. The vulnerability operates at the application layer and can be exploited through legitimate authenticated sessions, making it particularly dangerous as it leverages existing user credentials rather than requiring additional authentication methods. This type of vulnerability is categorized under CWE-284 which specifically addresses improper access control issues in software systems.
The operational impact of CVE-2025-6741 extends beyond simple data theft, as it enables potential lateral movement within the Devolutions Server environment and could facilitate more extensive attacks. An attacker with access to the secure message component could systematically enumerate and access entries that contain sensitive information such as credentials, personal data, or proprietary business information. The vulnerability's exploitation could result in significant data breaches, regulatory compliance violations, and potential financial losses for organizations relying on Devolutions Server for secure data management. The attack surface is particularly concerning given that the flaw affects the core messaging functionality of the platform, which likely serves as a communication channel for sensitive organizational data.
Organizations utilizing affected Devolutions Server versions should prioritize immediate remediation through official patches provided by Devolutions. The recommended mitigation strategy involves applying the latest security updates to all impacted systems while implementing additional monitoring for unauthorized access attempts to secure message entries. Network segmentation and enhanced logging of access patterns within the secure message component can help detect potential exploitation attempts. Security teams should also conduct comprehensive audits of user permissions and access controls to identify any unauthorized access that may have already occurred. This vulnerability aligns with ATT&CK technique T1078 which covers valid accounts and privilege escalation through unauthorized access to restricted resources. Organizations should consider implementing zero trust principles and additional authentication layers for sensitive data access to reduce the impact of such flaws in their security posture.