CVE-2025-67561 identifies a missing authorization vulnerability in the Oleksandr Lysyi Debug Log Viewer, a software tool used for viewing debug logs. The vulnerability stems from incorrectly configured access control mechanisms that fail to enforce proper authorization checks before granting access to debug logs. This flaw affects all versions up to and including 2.0.3. Because debug logs often contain sensitive information such as system details, error messages, and potentially credentials or personally identifiable information, unauthorized access can lead to significant information disclosure. The vulnerability does not require authentication or user interaction, making it easier for attackers to exploit if they can reach the interface. Although no known exploits have been reported in the wild, the lack of authorization controls presents a clear risk vector. No CVSS score has been assigned yet, and no official patches have been released at the time of publication. The vulnerability was published on December 9, 2025, by Patchstack. Organizations using this tool for debugging and monitoring should be aware of the risk of exposing sensitive internal data to unauthorized parties.

For European organizations, the primary impact of CVE-2025-67561 is the potential unauthorized disclosure of sensitive debug information. This can compromise confidentiality by exposing internal system details, error logs, and potentially sensitive operational data. Such exposure could aid attackers in further reconnaissance or exploitation of other vulnerabilities. The integrity and availability of systems are less directly impacted, but the information leakage alone can have serious consequences, including regulatory non-compliance under GDPR if personal data is exposed. Organizations in sectors such as finance, healthcare, telecommunications, and critical infrastructure that rely on Debug Log Viewer for troubleshooting are at higher risk. The ease of exploitation without authentication increases the threat level, especially if the tool is accessible over internal or external networks. The absence of known exploits currently limits immediate risk, but the vulnerability should be treated proactively to prevent future attacks.

1. Immediately restrict access to the Debug Log Viewer interface to trusted administrators only, using network segmentation and firewall rules. 2. Implement strong authentication and authorization controls around the tool, ensuring only authorized personnel can access debug logs. 3. Monitor access logs for any unauthorized or suspicious attempts to access the Debug Log Viewer. 4. Follow vendor communications closely and apply security patches or updates as soon as they become available. 5. If patching is delayed, consider disabling or uninstalling the Debug Log Viewer temporarily to eliminate exposure. 6. Conduct internal audits to identify where Debug Log Viewer is deployed and assess exposure risk. 7. Educate developers and system administrators about the risks of exposing debug information and enforce secure configuration practices. 8. Use encryption and secure channels (e.g., VPN, TLS) to protect access to debugging tools. 9. Review and sanitize debug logs to avoid storing sensitive data unnecessarily. 10. Integrate this vulnerability into organizational risk management and incident response plans.