CVE-2025-54766 is a security vulnerability identified in version 1.8 of the Xorux XorMon-NG product. The issue stems from an incorrect use of privileged APIs (classified under CWE-648), where an API endpoint intended exclusively for web application administrators is improperly exposed to lower-level read-only users. Although this endpoint is hidden from these users in the user interface, it remains accessible through direct API calls. This endpoint allows the export of the appliance configuration, which likely contains sensitive information such as system settings, credentials, network configurations, or other critical operational data. The vulnerability arises from insufficient access control enforcement on the API level, allowing unauthorized users to perform actions beyond their intended permissions. No public exploits have been reported yet, and no patch links are currently available, indicating that the vendor may not have released a fix at the time of this report. The lack of a CVSS score suggests that the vulnerability is newly disclosed and has not yet been fully assessed for severity by standard scoring systems.

For European organizations using XorMon-NG version 1.8, this vulnerability poses a significant risk to confidentiality and potentially integrity. Unauthorized export of appliance configurations can lead to exposure of sensitive operational data, which attackers could leverage to further compromise the system or the broader network. This could facilitate lateral movement, privilege escalation, or targeted attacks against critical infrastructure. The impact is particularly severe for organizations relying on XorMon-NG for monitoring or managing critical systems, as the leaked configuration data may include sensitive credentials or network topology information. Although the vulnerability does not directly affect availability, the confidentiality breach could lead to subsequent attacks that disrupt services. Given the appliance nature of XorMon-NG, the scope of affected systems is limited to organizations deploying this specific product version. However, the ease of exploitation is relatively high since no authentication elevation is required beyond a read-only user account, and no user interaction is needed beyond making API calls. This makes the vulnerability a credible threat vector for insider threats or external attackers who have obtained low-level credentials.

European organizations should immediately audit their deployments of XorMon-NG to identify instances running version 1.8. Until a vendor patch is available, organizations should implement strict network segmentation and access controls to limit API access to trusted administrators only. Monitoring and logging of API calls should be enhanced to detect unauthorized attempts to access the sensitive endpoint. If possible, disable or restrict the vulnerable API endpoint through configuration or firewall rules. Additionally, review and tighten user role assignments to ensure that read-only users do not have unnecessary API access. Organizations should engage with Xorux to obtain timelines for patches or workarounds and apply updates promptly once available. Conducting internal penetration testing to verify the vulnerability and assess exposure can help prioritize remediation efforts. Finally, consider implementing multi-factor authentication and anomaly detection to reduce the risk of compromised low-level accounts being used to exploit this vulnerability.