CVE-2025-59355 is a security vulnerability classified under CWE-532 (Insertion of Sensitive Information into Log File) affecting Apache Linkis versions 1.0.0 to 1.7.0. The vulnerability arises in the HiveUtils.decode() method, which attempts to perform Base64 decoding on input parameters. When decoding fails, the method logs the entire input string along with the error, including potentially sensitive data such as Hive Metastore keys or plaintext passwords embedded in configuration files like hive-site.xml. This results in sensitive information being written to log files, which may be accessible to unauthorized users if proper file permissions are not enforced. The vulnerability is triggered only if the configuration value is an invalid Base64 string and error-level logging is enabled. The Apache Linkis project addressed this issue in version 1.8.0 by modifying the error logging to exclude sensitive input data, instead logging only the error message. No known exploits are reported in the wild, and the likelihood of Base64 decoding failure is low, but the exposure of sensitive credentials in logs poses a confidentiality risk. The vulnerability does not affect the integrity or availability of the system but can lead to information leakage if logs are improperly secured.

For European organizations, the primary impact of CVE-2025-59355 is the potential leakage of sensitive credentials such as Hive Metastore passwords through log files. This can lead to unauthorized access to critical data stores if attackers gain access to these logs. The risk is heightened in environments where log files are accessible to multiple users or insufficiently protected. Although the probability of triggering the vulnerability is low, the exposure of plaintext passwords can facilitate lateral movement or privilege escalation within enterprise data platforms. Organizations relying on Apache Linkis for data integration and analytics, especially those handling sensitive or regulated data under GDPR, face compliance and reputational risks if such information leakage occurs. The vulnerability does not directly affect system availability or integrity but compromises confidentiality, which can have cascading effects on overall security posture.

European organizations should upgrade Apache Linkis to version 1.8.0 or later, where the vulnerability is fixed by desensitizing error logs. Until upgrading is possible, organizations should implement strict access controls on log files to ensure only authorized administrators can read them. Review and audit logging configurations to minimize error-level logging exposure of sensitive data. Additionally, validate and sanitize configuration inputs to prevent invalid Base64 strings from being processed. Employ centralized log management solutions with encryption and role-based access controls to protect sensitive logs. Regularly monitor logs for any unexpected error messages that might indicate attempts to exploit this vulnerability. Finally, conduct security awareness training for administrators to understand the risks of sensitive data exposure in logs and enforce secure operational practices.