The Import Export Suite for CSV and XML Datafeed plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the import_single_post_as_csv() function in all versions up to, and including, 7.19. This makes it possible for authenticated attackers, with Subscriber-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.
https://www.infosecurity-magazine.com/news/wp-ultimate-csv-importer-flaws/