WAPT Server SQL Injection via /api/v3/hosts Endpoint

WAPT Server versions 2.6.1.17834 and earlier contains a SQL injection vulnerability in the `columns` parameter of the GET `/api/v3/hosts` endpoint. A remote authenticated user with read-only privileges can inject arbitrary PostgreSQL expressions into the SQL query constructed by WAPT. By exploiting the injection point, an attacker can inject additional PostgreSQL statements, bypass the host scope restrictions applied to the account, and read information from other rows or tables within the database.