The Tz Weekly Radio Schedule WordPress plugin through 1.8.1 does not sanitize and escape a parameter before using it to build a SQL query on an AJAX action available to unauthenticated users, allowing unauthenticated attackers to perform SQL injection attacks and extract sensitive data from the database.
https://wpscan.com/vulnerability/802f208f-a3dd-4dc7-b1d2-ec455f0350f7/