Version 4.3.6

applications/core/modules/front/system/warnings.php

@@ -205,7 +205,7 @@ class _warnings extends \IPS\Content\Controller
 		if ( isset( $_SERVER['HTTP_REFERER'] ) )
 		{
 			$url = \IPS\Http\Url\Friendly::createFromString( $_SERVER['HTTP_REFERER'] );
-			if ( $url instanceof \IPS\Http\Url\Internal )
+			if ( $url instanceof \IPS\Http\Url\Internal and !$url->openRedirect() )
 			{
 				\IPS\Output::i()->redirect( $url );
 				return;