CVE-2025-2499: Remote Desktop Manager Auth Bypass Flaw

CVE-2025-2499 Overview

CVE-2025-2499 is a client-side access control bypass in the permission component of Devolutions Remote Desktop Manager on Windows. An authenticated user can bypass certain permission restrictions by performing specific actions in the client. The bypass affects the View Password, Edit Asset, and Edit Permissions controls, allowing users to perform operations they should be denied. The flaw is tracked under CWE-284: Improper Access Control and affects Remote Desktop Manager versions from 2025.1.24 through 2025.1.25, and all versions up to 2024.3.29.

Critical Impact

Authenticated users can view protected passwords, modify assets, and change permission assignments without holding the required entitlements.

Affected Products

• Devolutions Remote Desktop Manager (Free edition) on Windows — versions up to 2024.3.29 and 2025.1.24 through 2025.1.25
• Devolutions Remote Desktop Manager (Team edition) on Windows — versions up to 2024.3.29 and 2025.1.24 through 2025.1.25
• Deployments relying on Remote Desktop Manager permission controls for shared vaults and entries

Discovery Timeline

• 2025-03-26 - CVE-2025-2499 published to the National Vulnerability Database
• 2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-2499

Vulnerability Analysis

Remote Desktop Manager enforces per-entry permissions such as View Password, Edit Asset, and Edit Permissions to restrict what a signed-in user can do with a shared vault entry. In the affected versions, these permission checks are performed on the client side within the Windows application. An authenticated user with legitimate access to a data source can trigger specific client actions that skip the enforcement path and reach the underlying operation.

The result is a confidentiality and integrity issue. A user without the View Password right can retrieve stored credentials for shared entries. A user without Edit Asset or Edit Permissions rights can alter entry data or reassign who may access it. Because the bypass runs through legitimate authenticated sessions, actions blend into normal application telemetry.

Root Cause

The root cause is client-side enforcement of access control decisions that should be validated server-side. The Devolutions security advisory DEVO-2025-0005 attributes the issue to the permission component in the Windows client. When a specific sequence of user actions is executed, the client does not re-evaluate the permission state before invoking the guarded operation.

Attack Vector

Exploitation requires an authenticated account with access to the shared data source that contains the target entries. No user interaction from a victim is needed and no elevated privileges are required beyond a standard authenticated session. The attacker uses the Remote Desktop Manager Windows client itself to perform the sequence that bypasses the permission gate, then reads credentials or writes changes to the affected entry. Refer to the vendor advisory for the specific reproduction context.

Detection Methods for CVE-2025-2499

Indicators of Compromise

• Audit log entries showing View Password, Edit Asset, or Edit Permissions actions performed by user accounts that were not granted those rights on the target entry
• Modifications to permission assignments on shared vault entries that do not correspond to an approved change request
• Unexpected credential retrievals for shared entries by low-privileged users, especially outside normal working hours

Detection Strategies

• Enable and centralize Devolutions data source audit logs, then baseline which users legitimately hold View Password, Edit Asset, and Edit Permissions rights per vault
• Alert on any audit event where the acting user's effective permissions on the target entry do not include the action performed
• Correlate Windows endpoint process telemetry for RemoteDesktopManager.exe with authentication events and subsequent lateral movement using credentials retrieved from Remote Desktop Manager

Monitoring Recommendations

• Track installed Remote Desktop Manager client versions across managed Windows endpoints and flag hosts still running versions up to 2024.3.29 or in the 2025.1.24 through 2025.1.25 range
• Monitor for use of credentials that are only stored in Remote Desktop Manager appearing on hosts or services the retrieving user does not normally access
• Review permission-change history in the Devolutions data source on a scheduled cadence and require a second reviewer for changes to shared or privileged entries

How to Mitigate CVE-2025-2499

Immediate Actions Required

• Upgrade Remote Desktop Manager for Windows to a fixed release as identified in Devolutions advisory DEVO-2025-0005
• Inventory Windows endpoints running vulnerable versions and prioritize upgrades for accounts with access to shared or privileged vaults
• Rotate credentials stored in shared entries where unauthorized View Password actions cannot be ruled out from audit logs
• Review recent permission changes on shared vault entries and revert any unauthorized modifications

Patch Information

Devolutions has published fixed versions in security advisory DEVO-2025-0005. Administrators should consult the advisory for the exact fixed build numbers for the Free and Team editions and deploy the update through their standard software distribution channel. The vulnerability affects Remote Desktop Manager versions from 2025.1.24 through 2025.1.25, and all versions up to 2024.3.29.

Workarounds

• Restrict Remote Desktop Manager data source access to trusted users only until every Windows client is patched
• Reduce the scope of shared vaults containing high-value secrets and move highly sensitive credentials to a Privileged Access Management system with server-enforced access control
• Enforce audit logging on the Devolutions data source and review it frequently for anomalous View Password, Edit Asset, and Edit Permissions events

# No vendor-provided configuration workaround is available.
# Consult DEVO-2025-0005 for the required client upgrade path.