Upgrade to 4.22.1 (#121)

Resources/public/CHANGES.md

@@ -1,5 +1,57 @@
-CKEditor 4 Changelog
-====================
+⚠️️️ **CKEditor 4 (the open source edition) is no longer maintained.** ⚠️
+
+If you would like to keep access to future CKEditor 4 security patches, check the [Extended Support Model](https://ckeditor.com/ckeditor-4-support/), which guarantees **security updates and critical bug fixes until December 2026**. Alternatively, [upgrade to CKEditor 5](https://ckeditor.com/docs/ckeditor5/latest/updating/ckeditor4/migration-from-ckeditor-4.html).
+
+## CKEditor 4.22.0 / 4.22.1
+
+⚠️ This is the last open source release of CKEditor 4. As announced in 2018, CKEditor 4 has reached its End of Life in June 2023.
+
+
+New Features:
+
+* [#5316](https://github.com/ckeditor/ckeditor4/issues/5316): Added vertical margins support for list elements in the [Paste from Word](https://ckeditor.com/cke4/addon/pastefromword) plugin.
+* [#5410](https://github.com/ckeditor/ckeditor4/issues/5410): Added the ability to indicate the language of styles in the [Styles Combo](https://ckeditor.com/cke4/addon/stylescombo) plugin via the [`config.styleSet`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html#cfg-stylesSet) configuration option.
+* [#5510](https://github.com/ckeditor/ckeditor4/issues/5510): Added notification system to the editor informing users that the editor version is up-to-date and secure. See [`config.versionCheck`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html#cfg-versionCheck) configuration option to learn more.
+
+Fixed Issues:
+
+* [#5437](https://github.com/ckeditor/ckeditor4/issues/5437): Fixed: Incorrect indication of selected items in combo boxes. The selected item was unmarked upon each opening of the combo box.
+* [#5495](https://github.com/ckeditor/ckeditor4/issues/5495): Fixed: Insufficient color ratio for links inside [Notifications](https://ckeditor.com/cke4/addon/notification).
+
+Other Changes:
+
+* [#5412](https://github.com/ckeditor/ckeditor4/issues/5412): Prevent using `document.domain` in Firefox in the [Preview](https://ckeditor.com/cke4/addon/preview) plugin.
+
+Note: CKEditor 4.22.1 has been released immediately after 4.22.0 to fix the README issues on [npm](https://www.npmjs.com/) and contains no changes vs 4.22.0.
+
+## CKEditor 4.21.0
+
+**Security Updates:**
+
+A cross-site scripting vulnerability has been discovered affecting [Iframe Dialog](https://ckeditor.com/cke4/addon/iframe) and [Media Embed](https://ckeditor.com/cke4/addon/embed) plugins.
+
+This vulnerability might affect a small percentage of integrators that depend on dynamic editor initialization/destroy mechanism. See [GitHub advisory](https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-vh5c-xwqv-cv9g) for more details.
+
+**Potential breaking changes**
+
+In some rare cases, a security release may introduce a breaking change to your application. We have provided configuration options that will help you mitigate any potential issues with the upgrade:
+
+- Starting from version 4.21, the [Iframe Dialog](https://ckeditor.com/cke4/addon/iframe) plugin applies the `sandbox` attribute by default, which restricts JavaScript code execution in the iframe element. To change this behavior, configure the [`config.iframe_attributes`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html#cfg-iframe_attributes) option.
+- Starting from version 4.21, the [Media Embed](https://ckeditor.com/cke4/addon/embed) plugin regenerates the entire content of the embed widget by default. To change this behavior, configure the [`config.embed_keepOriginalContent`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html#cfg-embed_keepOriginalContent) option.
+
+If you choose to change either of the above options, make sure to properly configure [Content Security Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP) to avoid any potential security issues that may arise from embedding iframe elements on your web page.
+
+You can read more details in the relevant security advisory and [contact us]([email protected]) if you have more questions.
+
+**An upgrade is highly recommended!**
+
+New Features:
+
+* [#4400](https://github.com/ckeditor/ckeditor4/issues/4400): Added the [`config.uploadImage_supportedTypes`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html#cfg-uploadImage_supportedTypes) configuration option allowing to change the image formats accepted by the [Upload Image](https://ckeditor.com/cke4/addon/uploadimage) plugin. Thanks to [SilverYoCha](https://github.com/SilverYoCha)!
+
+Fixed Issues:
+
+* [#5431](https://github.com/ckeditor/ckeditor4/issues/5431): Fixed: No notification is shown when pasting or dropping unsupported image types into the editor.
 
 ## CKEditor 4.20.2
 

Resources/public/LICENSE.md

@@ -1,7 +1,15 @@
-Software License Agreement
-==========================
+Software License Agreement for CKEditor 4 LTS (4.23.0 and above)
+================================================================
 
-CKEditor - The text editor for Internet - https://ckeditor.com/
+CKEditor - The text editor for Internet - https://ckeditor.com/ <br>
+Copyright (c) 2003-2023, CKSource Holding sp. z o.o. All rights reserved.
+
+CKEditor 4 LTS ("Long Term Support") is available under exclusive terms of the [Extended Support Model](https://ckeditor.com/ckeditor-4-support/). [Contact us](https://ckeditor.com/contact/) to obtain a commercial license.
+
+Software License Agreement for CKEditor 4.22.* and below
+========================================================
+
+CKEditor - The text editor for Internet - https://ckeditor.com/ <br>
 Copyright (c) 2003-2023, CKSource Holding sp. z o.o. All rights reserved.
 
 Licensed under the terms of any of the following licenses at your

Resources/public/README.md

@@ -1,8 +1,8 @@
 CKEditor 4
 ==========
 
-Copyright (c) 2003-2022, CKSource Holding sp. z o.o. All rights reserved.
-https://ckeditor.com - See LICENSE.md for license information.
+Copyright (c) 2003-2023, CKSource Holding sp. z o.o. All rights reserved.
+https://ckeditor.com - See https://ckeditor.com/legal/ckeditor-oss-license for license information.
 
 CKEditor 4 is a text editor to be used inside web pages. It's not a replacement
 for desktop text editors like Word or OpenOffice, but a component to be used as

Resources/public/build-config.js

@@ -13,10 +13,10 @@
  * (1) https://ckeditor.com/cke4/builder
  *     Visit online builder to build CKEditor from scratch.
  *
- * (2) https://ckeditor.com/cke4/builder/4a0da7ab1503f1a89af320aafef31a65
+ * (2) https://ckeditor.com/cke4/builder/2b31fa57813bcb80382fe999ef278d59
  *     Visit online builder to build CKEditor, starting with the same setup as before.
  *
- * (3) https://ckeditor.com/cke4/builder/download/4a0da7ab1503f1a89af320aafef31a65
+ * (3) https://ckeditor.com/cke4/builder/download/2b31fa57813bcb80382fe999ef278d59
  *     Straight download link to the latest version of CKEditor (Optimized) with the same setup as before.
  *
  * NOTE: