wpForo Forum <= 3.2.2 - Unauthenticated SQL Injection via 'href[locale]' Parameter

The wpForo Forum plugin for WordPress is vulnerable to time-based SQL Injection via the 'href[locale]' parameter in all versions up to, and including, 3.2.2 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. 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. The nonce required for exploitation is publicly issued to unauthenticated visitors on any forum page via the wpforo.nonces JavaScript object, meaning no account or prior interaction beyond a page load is required to obtain it.