Language: Java
Label: vulnerable
CWE: CWE-89 \u2014 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.

Code:
    private static String getDatabaseUrl(DatabaseConfiguration dbConfig) {

        int port = dbConfig.getDatabasePort();
        return "jdbc:" + dbConfig.getDatabaseType().toLowerCase() + "://" + dbConfig.getDatabaseHost()
                + ((port == 0) ? "" : (":" + port)) + "/" + dbConfig.getDatabaseName();

    }