CVE-2025-54781 is a vulnerability identified in the himmelblau interoperability suite, specifically versions 1.0.0 up to but not including 1.1.0. Himmelblau is designed to facilitate integration between Microsoft Azure Entra ID and Intune, two critical components in enterprise identity and device management. The vulnerability arises when debugging is enabled in the himmelblaud_tasks service, which inadvertently logs an Intune service access token into the system journal. This token, although short-lived, grants visibility into the host's Intune compliance status and potentially allows further administrative actions on the Intune-managed device. The API endpoints that could be leveraged for these administrative operations are undocumented, which may limit exploitability but does not eliminate risk. The vulnerability is classified under CWE-532, indicating the insertion of sensitive information into log files, a common security misconfiguration that can lead to information disclosure. The issue is resolved in version 1.1.0 by disabling the logging of sensitive tokens during debugging. The CVSS v3.1 base score is 2.8, reflecting a low severity primarily due to the requirement for local access (AV:L), high privileges (PR:H), and user interaction (UI:R), combined with limited confidentiality impact and no integrity or availability impact. No known exploits are currently reported in the wild.

For European organizations, the impact of this vulnerability is primarily related to information disclosure and potential privilege escalation within Intune-managed environments. Since Intune is widely used for device compliance and management across enterprises, leaking access tokens could allow an attacker with local access and high privileges to glean compliance status and possibly perform unauthorized administrative tasks on managed devices. This could undermine endpoint security policies, potentially allowing compromised devices to evade detection or enforcement mechanisms. Although the token is short-lived and exploitation requires significant access and interaction, the risk is non-negligible in environments where insider threats or lateral movement by attackers are concerns. The vulnerability does not directly affect confidentiality of broader organizational data but could weaken device management controls, indirectly impacting security posture. Given the integration with Microsoft Azure Entra ID, any compromise could also affect identity and access management workflows, which are critical for regulatory compliance in Europe (e.g., GDPR).

To mitigate this vulnerability, European organizations using himmelblau versions 1.0.0 to 1.0.x should immediately disable debugging mode in the himmelblaud_tasks service to prevent sensitive token leakage into logs. Upgrading to version 1.1.0 or later, where the issue is fixed, is strongly recommended. Additionally, organizations should audit their system journals and logs to identify and securely remove any leaked tokens. Implement strict access controls and monitoring on systems running himmelblau to detect unauthorized access attempts, especially from users with high privileges. Employ robust endpoint detection and response (EDR) solutions to monitor for suspicious administrative operations on Intune-managed devices. Finally, review and tighten logging configurations to avoid logging sensitive information in all services, and conduct regular security training to ensure that debugging is only enabled in secure, controlled environments.