The AnWP Football Leagues plugin for WordPress is vulnerable to CSV Injection in all versions up to, and including, 0.16.17 via the download_csv_players and download_csv_games functions. This makes it possible for authenticated attackers, with Administrator-level access and above, to embed untrusted input into exported CSV files, which can result in code execution when these files are downloaded and opened on a local system with a vulnerable configuration.
The product saves user-provided information into a Comma-Separated Value (CSV) file, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as a command when the file is opened by a spreadsheet product.