The plugin does not protect some of its actions against CSRF attacks, allowing an unauthenticated attacker to perform actions on their behalf by tricking a logged in user to submit a crafted request.
patchstack.com/database/vulnerability/smart-app-banner/wordpress-smart-app-banner-plugin-1-1-2-cross-site-request-forgery-csrf-vulnerability
www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/smart-app-banner/smart-app-banner-112-cross-site-request-forgery-via-wsl-smart-app-banner-options