The Profile Extra Fields by BestWebSoft plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the prflxtrflds_export_file function in versions up to, and including, 1.2.7. This makes it possible for unauthenticated attackers to expose potentially sensitive user data, including data entered into custom fields.
https://plugins.trac.wordpress.org/changeset/2975179/profile-extra-fields