Medium
log4js-node module for Node.js could allow a local authenticated attacker to obtain sensitive information, caused by an issue with the default file permissions for log files created by the file, fileSync and dateFile appenders are world-readable. By gaining access to the log files, an attacker could exploit this vulnerability to obtain sensitive information, and use this information to launch further attacks against the affected system.
NodeJs
Upgrade to the latest version of log4js-node, available from the log4js-node GIT Repository.