TranslatePress <= 2.3.2 - Authenticated (Administrator+) SQL Injection

The Translate Multilingual sites WordPress plugin is vulnerable to an authenticated SQL injection in versions up to, and including, 2.3.2 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. By adding a new language (via the settings page) containing specific special characters, the backticks in the SQL query can be surpassed. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.