The WP DSGVO Tools (GDPR) WordPress plugin before 3.1.40 does not perform an authorization check on the immediate-processing path of its data subject access request feature, allowing unauthenticated attackers to generate and download the full personal-data export (including name, postal address, phone number, email, and comment content) of any user, customer, or commenter by supplying their email address.
https://wpscan.com/vulnerability/49170650-0006-4f3b-90f4-f8bb176beb7b/