Completed
Last Updated: 18 Nov 2025 15:10 by ADMIN
Release 2025 Q4 SP1
I have a RadEditor that is rendered in mobile mode on a mobile device emulator in Chrome browser.
For this editor, I have subscribed to OnClientCommandExecuted event. The event fires, but the problem is that it fires twice for ToggleScreenMode command.
To reproduce this issue, you can use the page code below and render it in Chrome mobile emulator; then press on edit pencil button followed by clicking the check button.

<%@ Page https://goo.gl/ddHuHyLanguage="C#" AutoEventWireup="true" %>
<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Command event firing twice for ToggleScreenMode in Mobile Render Mode</title>
    <meta name="viewport" content="width=device-width,intial-scale=1.0, maximum-scale= 1.0,,user-scalable=no"/>
</head>
<body>
    <form id="form1" runat="server">
         <telerik:RadScriptManager ID="RadScriptManager1" runat="server">
            <Scripts>
                <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js"></asp:ScriptReference>
                <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQuery.js"></asp:ScriptReference>
                <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQueryInclude.js"></asp:ScriptReference>
            </Scripts>
        </telerik:RadScriptManager>
    <div>
    <telerik:RadEditor ID="RadEditor1" runat="server" AutoResizeHeight="True" RenderMode="Auto" OnClientCommandExecuted="CommandExecuted" Width="99%">
            </telerik:RadEditor>
    </div>
        <script>
            function CommandExecuted(sender, args) {
                if (args.get_commandName() === "ToggleScreenMode" && (typeof sender.isFullScreen() === "undefined" ||
                    sender.isFullScreen() === false)) {
                    alert("Command Executed Fired for ToggleScreenMode");
                }
            }
        </script>
    </form>
</body>
</html>

Workaround:
<telerik:RadEditor ID="RadEditor1" runat="server" AutoResizeHeight="True" RenderMode="Auto" OnClientCommandExecuted="CommandExecuted" Width="99%">
    <Content>dadas</Content>
</telerik:RadEditor>
<script>
    function CommandExecuted(editor, args) {
        if (args.get_commandName() == "ToggleScreenMode") {
            var goingIntoReadMode = $telerik.$(editor.get_element()).find(".reIcon.reIconEditContent").is(":visible");
 
            if (goingIntoReadMode == false) {
                editor.__modifiedContentAlready = false;
                //modify content for edit mode
                console.log("modify content for edit mode")
            }
            if (goingIntoReadMode == true && editor.__modifiedContentAlready == false) {
                //modify content for read mode
                console.log("modify content for read mode");
                editor.__modifiedContentAlready = true;
            }
        }
    }
</script>
Completed
Last Updated: 18 Nov 2025 15:09 by ADMIN
Release 2025 Q4 SP1
Created by: Narendran
Comments: 1
Category: Editor
Type: Bug Report
0
hank you for providing the script details — the previous JavaScript error has now been resolved.
However, we noticed a new behavior related to the Undo operation:
Steps to reproduce:
  1. In Design mode, select all text (Ctrl + A) and delete it.
  2. Switch to HTML mode.
  3. Switch back to Design mode.
  4. Press Ctrl + Z (Undo).
Observed behavior:
  • The first Ctrl + Z has no effect; the deleted text is restored only after pressing Ctrl + Z a second time.
Could you please check this and give your feedback.
Completed
Last Updated: 05 Nov 2025 13:53 by ADMIN
Release R2 2023

Using the latest 2022.3.1109.45, our web application is catching "Invalid Resource Request" exceptions when the Windows7 or Vista (maybe others too) loads the "Editor" control in "Classic" mode.    By decoding the URL, the control is having problems locating the image below

WebResource.axd?d=ZHkUja8e5EF7zNoz8IiY_kAGH7MBQgCnq0BEYT2AtFLv57GDfGbEymwRG8H68WuiE_6l2fpZpqb_FzVc_OItknX-LMTzvQOwC0Mk8HaCtGvNzWl-5nNlZ6xpbOjNSk4A0QtPGtyV0UA-BWX4bOfPU8EI30eAVg8UO6p7yERiuEbCUoiZOGUevYGPdrNVvPel0&t=638034624000000000
Error Message: This is an invalid webresource request.

Telerik.Web.UI.Skins|Telerik.Web.UI.Skins.Vista.Editor.ToolbarVerticalSprites.gif

Telerik.Web.UI.Skins|Telerik.Web.UI.Skins.Windows7.Editor.ToolbarSprites.gif

Change the skin of the radeditor in the default.aspx to another skin such as "metro" and the problem will not happen.    It works OK at least on Black, Metro and Silk but haven't tested others, you can tell it doesn't work when the divider bars in the editor toolbar don't appear properly.

Completed
Last Updated: 23 Oct 2025 09:31 by ADMIN
Release 2025 Q4 (Nov)
Created by: Andrew
Comments: 16
Category: Editor
Type: Bug Report
1

Hi,

I am contacting you today to let you know I have found cross-site scripting vectors within the latest version of the RadEditor. I have attached images of the payloads that seem to bypass the XSS filter.

The second payload only works on Firefox browsers, but the first works on Chrome browsers too. While it still requires users to click on the link to trigger XSS, it can be easily social engineered in most situations.

Completed
Last Updated: 21 Oct 2025 09:52 by ADMIN
Release 2025 Q4 (Nov)

When using RadEditor with the StripDomEventAttributes content filter enabled, script execution can still occur when switching from HTML to Design mode.

Certain HTML and SVG elements containing attributes such as onload, onclick, or href/to values that start with javascript: are not fully sanitized before the editor’s content is rendered in Design view. As a result, embedded script code can run during the mode transition even though the anti-script filter is active.

Reproduction steps:

Add a RadEditor with the default filters:

<telerik:RadEditor runat="server" ID="RadEditor1"
    ContentFilters="DefaultFilters,StripDomEventAttributes">
</telerik:RadEditor>


  1. Load the page.
  2. Switch the editor to HTML mode.
  3. Paste any of the following samples (look below)
  4. Switch to Design view
  5. Watch alerts
<svg/onload=alert(1)><svg>
<svg
onload=alert(1)><svg> # newline char
<svg	onload=alert(1)><svg> # tab char
<svgonload=alert(1)><svg> # new page char (0xc)

 

 

 

Completed
Last Updated: 24 Jul 2025 14:08 by ADMIN
Release 2025 Q3 (Aug)
In earlier versions of the editor, the css class was applied to the image tag itself, which is the correct way to do it. Otherwise the applied css class has no effect on the image.
Completed
Last Updated: 16 Jul 2025 12:29 by ADMIN
Created by: Atul
Comments: 1
Category: Editor
Type: Feature Request
0
When we edit the widget > click on the table on a random cell > select Table Properties > The table wizard will always default to the top left cell > This is working as expected.
If you click in the table (not the editor) and select Cell Properties > the wizard will display (highlight) the cell you selected in the table is it expected that when selecting table properties it always default to the left side first box but when selecting cell properties it will show the current cell which we are in.

video link:- https://jam.dev/c/c1cdf56c-53ab-4218-8774-65907b3efd6d 
Completed
Last Updated: 04 Jul 2025 12:39 by ADMIN
Release 2025 Q3 (Aug)
When loading RadEditor (Telerik UI for ASP.NET AJAX 2025 Q2) in Internet Explorer 10/11 or Edge in IE Compatibility Mode, the editor does not render and JavaScript errors occur immediately upon page load.

SCRIPT1002: Syntax error
SCRIPT5022: Sys.ArgumentUndefinedException: Value cannot be undefined. Parameter name: type
Completed
Last Updated: 25 Jun 2025 15:12 by ADMIN
Release 2025 Q3 (Aug)
Created by: Devops
Comments: 1
Category: Editor
Type: Bug Report
0

Hi,

We are using Material Theme in our application. We see the problem in Rad Editor's Ribbon. Some icons are overlapping the Text. In the demo, it seems to be same behavior.

Regards,
Jamil

Completed
Last Updated: 24 Jun 2025 13:12 by ADMIN
Release 2025 Q3 (Aug)
Steps to Reproduce:
1. Insert a table and add some data to the table in Chrome
2. Above the Table, insert some text
3. Highlight the text and drag cursor to highlight half of the data in the table
4. Hit Delete on your keyboard

Result: The colgroup is removed from the table
Completed
Last Updated: 24 Jun 2025 07:35 by ADMIN
Release 2025 Q3 (Aug)
Completed
Last Updated: 24 Feb 2025 12:37 by ADMIN

I am experiencing an issue in the Telerik Rad Editor where, after copying and pasting a long sentence in a single line, if I apply bold formatting to a word and place the cursor at the beginning of the bolded word, pressing Enter results in an empty line being inserted between the text. This behavior is reproducible on the Telerik webforms editor demo site as well.

I would appreciate any guidance on how to resolve this issue. Thanks in advance.

Completed
Last Updated: 14 Jan 2025 16:24 by ADMIN
Release 2025 Q1 (Feb)
Created by: Don Leduc
Comments: 2
Category: Editor
Type: Bug Report
0
I have a big problem here. I have the following code and this code is launched in RadWindow as well:

<telerik:RadTabStrip runat="server" ID="RadTabStrip2" MultiPageID="RadMultiPage2" SelectedIndex="0">
    <Tabs>
        <telerik:RadTab Text="Add Response"></telerik:RadTab>
    </Tabs>
</telerik:RadTabStrip>
<telerik:RadMultiPage runat="server" ID="RadMultiPage2" SelectedIndex="0">
    <telerik:RadPageView runat="server" ID="RadPageView11">
 
            <telerik:RadEditor Width="100%" EditModes="Design" ID="reReqCom" runat="server"  ContentAreaCssFile="~/AppRoot/Xml/RadEditor/EditorContentArea.css"
                ToolsFile="~/AppRoot/Xml/RadEditor/BasicTools.xml" Skin="Material" />
 
    </telerik:RadPageView>
</telerik:RadMultiPage>

 
The problem here is only using the iPhone (ioS), that the user is NOT able to select onto the RadEditor to begin typing. Seems to somehow block it out. I have stripped down to the basic code above and tested.

Can you tell us if this is a known issue?

Is there a workaround?

 

Don
Completed
Last Updated: 14 Jan 2025 13:52 by ADMIN
Release 2025 Q1 (Feb)
Steps to reproduce:
1. go to demo url http://demos.telerik.com/aspnet-ajax/editor/examples/edittemplate/defaultcs.aspx
2. click add new record
3. try to manually resize editor. it won't.
4. click add new record again.
5  try to manually resize editor, now it will.
Completed
Last Updated: 14 Jan 2025 13:46 by ADMIN
Release 2025 Q1 (Feb)
Completed
Last Updated: 16 Dec 2024 14:03 by ADMIN
Workaround is to add the following function override at the end of the page (a sample is attached below)
				Telerik.Web.UI.Editor.Utils.isWindowDestroyed = function (window) {
					var doc;
					try{
						doc = window.document;
					} catch (e) {
						return true;
					}
					if(Telerik.Web.Browser.safari && !doc){
						return true;
					}
					return !doc.defaultView && !doc.parentWindow;
				}
Completed
Last Updated: 11 Nov 2024 14:33 by ADMIN
It is a common scenario users to start selecting text and accidental trigger mouseup event outside of the content area. Still, the focus is inside RadEditor and InlineEditCompleted event should not fire.

Possible workaround:

<telerik:RadEditor runat="server" ID="RadEditor1" EditType="Inline"
    OnClientLoad="OnClientLoad" OnClientInlineEditCompleted="OnClientInlineEditCompleted">
    <Content>
       some text
    </Content>
</telerik:RadEditor>

<script>
    function OnClientInlineEditCompleted(sender, args) {
        if (sender._editCompleted) {
            alert("Fired!");
        }
    }

    function OnClientLoad(sender, args) {
        $telerik.$(document).on("mouseup", function (e) {
            if (e.target === sender.get_contentArea() || e.target === sender.get_textArea()) {
                sender._editCompleted = true;
            }
        })

        $telerik.$(document).on("mousedown", function (e) {
            if (e.target === sender.get_contentArea() || e.target === sender.get_textArea()) {
                sender._editCompleted = false;
            } else {
                sender._editCompleted = true;
            }
        })
    }
</script>

Completed
Last Updated: 19 Apr 2024 14:28 by ADMIN
Release 2024 Q2
Created by: reinout
Comments: 3
Category: Editor
Type: Bug Report
0

When I want to clear a class in the RadEditor the class is cleared in the hyperlink manager, but not in the area in the footer of the RadEditor.

If 'clear class' is selected nothing happens.

Completed
Last Updated: 10 Apr 2024 10:33 by ADMIN
Release 2024 Q2

When using Metro skin, if I click on a disabled button (Undo, Redo, Unlink and so on), its icon disappears until I click outside it.

https://demos.telerik.com/aspnet-ajax/editor/examples/overview/defaultcs.aspx?skin=Metro

This does not happen with MetroTouch, Silk or Default skin. How do I replicate the same behavior with Metro skin?

Completed
Last Updated: 13 Feb 2024 09:35 by ADMIN
In R3 2016 SP1 when a RadEditor with RenderMode=Classic is disposed and RadScriptManager is used, a JavaScript error is thrown:
IE:  Object doesn't support property or method 'dispose'
Chrome: Uncaught TypeError: this._contextMenuFunctionality.dispose is not a function

FIXED in R3 2016 SP2 (2016.3.1027)

There are three workarounds:
- Set EnableScriptCombine to false for the RadScriptManager (not applicable when CDN is used)
- OR set RenderMode=Lightweight for the RadEditor (you can do this in the web.config for all control instance in the web app if they do not define the Classic mode exiplicitly)
- OR add the following function override at the end of your page:

			<telerik:RadScriptManager ID="RadScriptManager1" runat="server" >
			</telerik:RadScriptManager>

			<%-- WORKAROUND 1: SET EnableScriptCombine="false" TO RADSCRIPTMANAGER--%>

			<asp:Button ID="Button1" Text="click to postback and break the editor" runat="server" />

			<telerik:RadEditor ID="txtInstructions" runat="server">
			</telerik:RadEditor>

			<%-- WORKAROUND 2: SET RenderMode="Lightweight" TO RADEDITOR--%>


			<%--WORKAROUND 3: ADD THE FOLLOWING SCRIPT TO THE END OF THE FORM--%>
			<script>

				Telerik.Web.UI.Editor.DefaultToolAdapter.prototype.dispose = function ()
				{
					delete this._fakeToolbarParentCreated;
					var toolbars = this._getToolBarElements();
					if (toolbars) {
						for (var i = 0; i < toolbars.length; i++) {
							$clearHandlers(toolbars[i]);
						}
					}
					this._tools = [];
					this._disposeToolbarModeHandlers();
					var wnd = this._toolbarHolder;
					if (wnd && wnd.dispose) wnd.dispose();
					var contextMenuFunctionality = this._contextMenuFunctionality;
					if (contextMenuFunctionality && contextMenuFunctionality.dispose) contextMenuFunctionality.dispose();
					Telerik.Web.UI.Editor.DefaultToolAdapter.callBaseMethod(this, "dispose");
				}
			</script>
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