CVE-2025-6711 in Server
Summary
by MITRE • 07/07/2025
An issue has been identified in MongoDB Server where unredacted queries may inadvertently appear in server logs when certain error conditions are encountered. This issue affects MongoDB Server v8.0 versions prior to 8.0.5, MongoDB Server v7.0 versions prior to 7.0.18 and MongoDB Server v6.0 versions prior to 6.0.21.
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Analysis
by VulDB Data Team • 10/03/2025
This vulnerability in MongoDB Server represents a critical information disclosure flaw that undermines the security posture of database systems relying on the affected versions. The issue manifests when specific error conditions occur during query processing, causing the server to log unredacted query content rather than sanitized or anonymized information. This behavior creates a significant risk for environments where sensitive data may be inadvertently exposed through log files, potentially compromising database security and compliance requirements. The vulnerability affects multiple major release branches including v8.0, v7.0, and v6.0, with specific patch versions required to mitigate the risk across each branch.
The technical implementation flaw stems from insufficient input sanitization within the server's error logging mechanism. When MongoDB encounters certain error conditions during query execution, the logging subsystem fails to properly redact sensitive information from the queries before writing them to server logs. This occurs particularly when error messages are generated for malformed queries, access violations, or other operational failures. The vulnerability is classified under CWE-209, which addresses improper error handling that can lead to information disclosure, and aligns with ATT&CK technique T1562.001 for credential access through information discovery. The flaw demonstrates poor separation of concerns in the logging infrastructure where query content is not adequately filtered or stripped of sensitive elements before persistent storage.
The operational impact of this vulnerability extends beyond simple data exposure, creating potential vectors for advanced persistent threats and compliance violations. Database administrators and security teams may unknowingly expose sensitive customer data, proprietary information, or authentication credentials through log files that are typically considered safe for monitoring purposes. This issue particularly affects environments where MongoDB serves as a backend for applications handling personally identifiable information, financial data, or other regulated information. The vulnerability can be exploited by attackers who gain access to system logs, potentially leading to credential theft, data exfiltration, or further system compromise. Organizations may face regulatory penalties under standards such as gdpr, hipaa, or pci dss due to unauthorized data exposure through log files.
Mitigation strategies should focus on immediate patching of affected MongoDB Server versions to the recommended secure releases including 8.0.5, 7.0.18, and 6.0.21. System administrators must implement comprehensive log monitoring and review procedures to identify any instances where unredacted queries may have been logged prior to patching. Additional protective measures include implementing log file access controls, regular log auditing, and deploying centralized logging solutions with automated redaction capabilities. Organizations should also consider implementing database activity monitoring tools that can detect and alert on suspicious query patterns or potential information disclosure events. The remediation process should include thorough testing of patched environments to ensure that error logging functions properly without exposing sensitive information, while maintaining the necessary diagnostic capabilities for legitimate operational troubleshooting.