This indicates an attack attempt to exploit a Privilege Elevation vulnerability in WordPress Plugin wp-gdpr-compliance.
The vulnerability is due to the application's failure to properly sanitize user input while handling a craft HTTP request. A remote attacker can send a crafted request to elevated privileges.
WordPress Plugin wp-gdpr-compliance version 1.4.2 and prior
Privilege Escalation: Remote attackers can leverage their privileges on vulnerable systems.
Apply the most recent upgrade or patch from the vendor.