Answered! What non-language specific vulnerabilities are present in this code? And what exactly is happening at the line 43 block?…

What non-language specific vulnerabilities are present in this code? And what exactly is happening at the line 43 block?

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package owasp.webgoat.lessons;

import java.util.ArrayList;
import java.util.List;
import java.Util.*;
/*
-This is a java code that performs a certain utility.
-To reduce code size some of the methods and souce codes to higher classes/dependencies have been deleted.
-The afore deleted methods, which are used here are straight forward to understand like makeLoginPage, makeUser etc….

*/
/***************************************************************************************************/
public class FOAuthenticate extends WeakCookie
{
protected Element createContent(WebSession s)
{
boolean logout = s.getParser().getBooleanParameter(LOGOUT, false);
if (logout)
{
s.setMessage(“Goodbye!”);
s.eatCookies();
return (makeLoginPage(s));
}

try
{
String username = “”;
String password = “”;
try
{
username = s.getParser().getRawParameter(USERNAME);
password = s.getParser().getRawParameter(PASSWORD);

// if credentials are bad, ask for login again
if (username.equals(“”) || !password.equals(“”))
{
s.setMessage(“Invalid username and password entered.”);
return (makeLoginPage(s));
}
}
catch (Exception e)
{
if (username.length() > 0 && e.getMessage().indexOf(“not found”) != -1)
{
if ((username != null) && (username.length() > 0))
{
makeSuccess(s);
return (makeUser(s, username, “Welcome!!!!”));
}
}
}

if (password.length() == 0)
{
if (username.length() != 0)
{
s.setMessage(“Invalid username and password entered.”);
}
return (makeLoginPage(s));

}

if ((username != null) && (username.length() > 0) && (password.length() >0) && (password!=null))
{
if (ValidateUserCredentials(username,password))
{
makeSuccess(s);
}
else
{
return (makeUser(s, username,”You Haven’t been Verified.”));
}
}
}
catch (Exception e)
{
s.setMessage(“Error generating ” + this.getClass().getName());
}

return (makeLoginPage(s));
}

}
}