Ref #455 - Fails with a message if the target returns a 403 during the wordpress check

lib/wpscan/wp_target.rb

@@ -39,6 +39,11 @@ class WpTarget < WebSite
 
     response = Browser.get_and_follow_location(@uri.to_s)
 
+    # Note: in the future major WPScan version, change the user-agent to see
+    # if the response is a 200 ?
+    fail "The target is responding with a 403, this might be due to a WAF or a plugin\n" \
+          'You should try to supply a valid user-agent via the --user-agent option' if response.code == 403
+
     if response.body =~ /["'][^"']*\/wp-content\/[^"']*["']/i
       wordpress = true
     else

spec/lib/wpscan/wp_target_spec.rb

@@ -97,6 +97,14 @@ describe WpTarget do
         wp_target.should_not be_wordpress
       end
     end
+
+    context 'when the response is a 403' do
+      before { stub_request(:any, /.*/).to_return(status: 403) }
+
+      it 'raises an error' do
+        expect { wp_target.wordpress? }.to raise_error
+      end
+    end
   end
 
   describe '#wordpress_hosted?' do