prevent xss attacks by manipulating text file names

apps/files_texteditor/js/editor.js

@@ -67,7 +67,7 @@ function setSyntaxMode(ext){
 function showControls(filename,writeperms){
 	// Loads the control bar at the top.
 	// Load the new toolbar.
-	var editorbarhtml = '<div id="editorcontrols" style="display: none;"><div class="crumb svg last" id="breadcrumb_file" style="background-image:url(&quot;'+OC.imagePath('core','breadcrumb.png')+'&quot;)"><p>'+filename+'</p></div>';
+	var editorbarhtml = '<div id="editorcontrols" style="display: none;"><div class="crumb svg last" id="breadcrumb_file" style="background-image:url(&quot;'+OC.imagePath('core','breadcrumb.png')+'&quot;)"><p>'+filename.replace(/</, "&lt;").replace(/>/, "&gt;")+'</p></div>';
 	if(writeperms=="true"){
 		editorbarhtml += '<button id="editor_save">'+t('files_texteditor','Save')+'</button><div class="separator"></div>';
 	}