An issue was discovered in the LifterLMS plugin through 3.34.5 for WordPress. The upload_import function in the class.llms.admin.import.php script is prone to an unauthenticated options import vulnerability that could lead to privilege escalation (administrator account creation), website redirection, and stored XSS.
https://wpvulndb.com/vulnerabilities/9871
https://wordpress.org/plugins/lifterlms/#developers
https://blog.nintechnet.com/critical-vulnerability-fixed-in-wordpress-lifterlms-plugin/