diff --git a/application/core/UpdateManager.php b/application/core/UpdateManager.php
index 024625b5..c4f5b0e1 100644
--- a/application/core/UpdateManager.php
+++ b/application/core/UpdateManager.php
@@ -210,22 +210,62 @@ class UpdateManager implements CallbackListener, CommandListener {
 			$this->maniaControl->chat->sendError('Update is currently not possible!', $player->login);
 			return;
 		}
-		$this->maniaControl->chat->sendInformation("Starting Update to Version v{$updateData->version}...", $player->login);
-		$this->maniaControl->log("Starting Update to Version v{$updateData->version}...");
-		$performBackup = $this->maniaControl->settingManager->getSetting($this, self::SETTING_PERFORM_BACKUPS);
-		if($performBackup && !$this->performBackup()) {
-			$this->maniaControl->chat->sendError('Creating backup failed.', $player->login);
-			$this->maniaControl->log("Creating backup failed.");
-		}
-		if(!$this->performCoreUpdate($updateData)) {
-			$this->maniaControl->chat->sendError('Update failed!', $player->login);
-			return;
-		}
-		$this->maniaControl->chat->sendSuccess('Update finished!', $player->login);
 
-		$this->maniaControl->restart();
+        if($this->checkPermissions($player)) {
+            $this->maniaControl->chat->sendInformation("Starting Update to Version v{$updateData->version}...", $player->login);
+            $this->maniaControl->log("Starting Update to Version v{$updateData->version}...");
+            $performBackup = $this->maniaControl->settingManager->getSetting($this, self::SETTING_PERFORM_BACKUPS);
+            if($performBackup && !$this->performBackup()) {
+                $this->maniaControl->chat->sendError('Creating backup failed.', $player->login);
+                $this->maniaControl->log("Creating backup failed.");
+            }
+            if(!$this->performCoreUpdate($updateData)) {
+                $this->maniaControl->chat->sendError('Update failed!', $player->login);
+                return;
+            }
+            $this->maniaControl->chat->sendSuccess('Update finished!', $player->login);
+
+            $this->maniaControl->restart();
+        }
 	}
 
+    private function checkPermissions(Player $player) {
+        $writableDirectories = array('core/', 'plugins/');
+        $readableDirectories = array('configs/');
+        $ignore              = array('.', '..');
+        $path                = str_replace('core', '', realpath(dirname(__FILE__)));
+
+        try {
+            foreach($writableDirectories as $writableDirecotry) {
+                $files = scandir($path.$writableDirecotry);
+                foreach($files as $file) {
+                    if(!in_array($file, $ignore)) {
+                        if(!is_writable($path.$writableDirecotry.$file)) {
+                            throw new \Exception('"'.$path.$writableDirecotry.$file.'" is not writable!');
+                        }
+                    }
+                }
+            }
+
+            foreach($readableDirectories as $readableDirectory) {
+                $files = scandir($path.$readableDirectory);
+                foreach($files as $file) {
+                    if(!in_array($file, $ignore)) {
+                        if(!is_readable($path.$readableDirectory.$file)) {
+                            throw new \Exception('"'.$path.$readableDirectory.$file.'" is not readable!');
+                        }
+                    }
+                }
+            }
+        } catch(\Exception $e) {
+            $this->maniaControl->log('Cannot update: '.$e->getMessage());
+            $this->maniaControl->chat->sendError('Cannot update: '.$e->getMessage(), $player->login);
+            return false;
+        }
+
+        return true;
+    }
+
 	/**
 	 * Check given Plugin Class for Update
 	 *