The issue allows local users to write to configuration files via a symlink attack on a temporary file. This is due to vulnerabilities in several functions, including ` write config`, `reset configuration`, `write config`, ` write mycnf`, `InnoBackupEx:: run prepare`, `InnoBackupEx::cmd`, `MySQLDump::cmd`, `InnoBackupExIncremental::cmd`, ` get actual db status`, and multiple class CbBackup methods.