From fde6558a6faeafd2e19d0870f7b2c1202b8aece4 Mon Sep 17 00:00:00 2001
From: HungryFeline <HungryFeline@users.noreply.github.com>
Date: Wed, 1 Jan 2014 01:41:11 +0100
Subject: [PATCH] Don't silently ignore invalid URLs

Scenario: Providing an invalid url via $_GET (wrong/missing extension or file isn't an image (also happens on download errors))
Behavior before: Silently redirect to index
Behavior after: Display error message
---
 core/extension.class.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/extension.class.php b/core/extension.class.php
index a1175341..0b4c767b 100644
--- a/core/extension.class.php
+++ b/core/extension.class.php
@@ -197,6 +197,9 @@ abstract class DataHandlerExtension extends Extension {
 				}
 			}
 		}
+		else{
+			throw new UploadException("Unsupported extension or file isn't an image");
+		}
 	}
 
 	public function onThumbnailGeneration(ThumbnailGenerationEvent $event) {