Event Espresso Core-Reg 4.10.7.p is vulnerable to cross-site scripting in wp-content/plugins/event-espresso-core-reg/admin_pages/messages/templates/ee_msg_admin_overview.template.php and allows remote attackers to inject arbitrary web script or HTML via the page parameter.
View the template here CVE-2020-26153.yaml
References:
https://github.com/ARPSyndicate/cvemon