The Import and export users and customers plugin for WordPress is vulnerable to Privilege Escalation in all versions up…

The Import and export users and customers plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 2.5.11 This is due to a non-atomic multi-option write sequence in the ACUI_Cron::save_settings() function, which persists acui_cron_activated, acui_cron_configured_by, acui_cron_user_id, and acui_cron_path_to_file before reaching the authorization gate that calls wp_die() when a non-promoter submits a role. This makes it possible for authenticated attackers holding a custom delegated role with create_users but without promote_users or edit_users to escalate their privileges to Administrator, provided a prior administrator cron-tab save exists and no successful save intervenes before the next unattended cron tick processes the attacker's repointed CSV file.