CVE-2025-5416 is a vulnerability identified in the Red Hat Build of Keycloak, an open-source identity and access management solution widely used for authentication and authorization services. The flaw resides in the /admin/serverinfo REST endpoint, which, when accessed by an authenticated user with administrative privileges, can inadvertently expose sensitive system environment information. This information may include configuration details, environment variables, or other metadata that could assist an attacker in mapping the system or planning further attacks. The vulnerability requires the attacker to already have authenticated access with high privileges (PR:H), and no user interaction is needed to exploit it. The CVSS v3.1 base score is 2.7, reflecting a low severity primarily due to the limited impact (confidentiality only), the requirement for prior authentication, and the absence of integrity or availability impacts. No known exploits are currently reported in the wild, and no patches have been explicitly linked yet. However, the exposure of sensitive environment information can facilitate reconnaissance activities, potentially enabling more sophisticated attacks if combined with other vulnerabilities or misconfigurations. The vulnerability affects all versions of the Red Hat Build of Keycloak where the /admin/serverinfo endpoint is accessible to authenticated users with sufficient privileges. Given Keycloak's role in managing authentication, any compromise or leakage of environment details could indirectly affect the security posture of dependent applications and services.

For European organizations, the exposure of sensitive system information through this vulnerability could aid attackers in gathering intelligence about the environment, such as software versions, configurations, or internal network details. While the direct impact is limited to confidentiality and does not affect system integrity or availability, the information disclosed could be leveraged in multi-stage attacks, including privilege escalation or lateral movement within the network. Organizations relying on Keycloak for critical identity management services may face increased risk if attackers combine this information with other vulnerabilities. The requirement for authenticated access with high privileges reduces the likelihood of external attackers exploiting this flaw directly but raises concerns about insider threats or compromised administrative accounts. The impact is more pronounced in environments where strict access controls and monitoring are not enforced. Given the widespread adoption of Red Hat and Keycloak in European public and private sectors, especially in regulated industries, the vulnerability could pose a moderate risk if not addressed promptly.

To mitigate the risk posed by CVE-2025-5416, organizations should first restrict access to the /admin/serverinfo endpoint strictly to trusted administrative users and implement strong authentication and authorization controls. Monitoring and logging access to this endpoint can help detect any unauthorized or suspicious activity. Network segmentation and the principle of least privilege should be enforced to limit exposure of administrative interfaces. Organizations should stay alert for official patches or updates from Red Hat and apply them promptly once available. In the interim, consider disabling or restricting the /admin/serverinfo endpoint if feasible without disrupting operations. Conduct regular audits of user privileges to ensure that only necessary personnel have administrative access. Additionally, implement multi-factor authentication (MFA) for all administrative accounts to reduce the risk of credential compromise. Finally, integrate this vulnerability into the organization's threat modeling and incident response plans to prepare for potential exploitation scenarios.