CKEditor 4 Changelog ==================== ## CKEditor 4.17.1 Fixed issues: * [#4979](https://github.com/ckeditor/ckeditor4/issues/3757): Added cache key in [#4761](https://github.com/ckeditor/ckeditor4/issues/4761) started to breaking relative links for external CSS resources. The fix had been reverted and will be corrected in the upcoming release. ## CKEditor 4.17 **Security Updates:** * Fixed XSS vulnerability in the core module reported by [William Bowling](https://github.com/wbowling). Issue summary: The vulnerability allowed to inject malformed comments HTML bypassing content sanitization, which could result in executing JavaScript code. See [security advisory](https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-7h26-63m7-qhf2) for more details. * Fixed XSS vulnerability in the core module reported by [Maurice Dauer](https://twitter.com/laytonctf). Issue summary: The vulnerability allowed to inject malformed HTML bypassing content sanitization, which could result in executing JavaScript code. See [security advisory](https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-pvmx-g8h5-cprj) for more details. You can read more details in the relevant security advisory and [contact us](security@cksource.com) if you have more questions. **An upgrade is highly recommended!** **Highlights:** Adobe [ended support of Flash Player](https://www.adobe.com/products/flashplayer/end-of-life.html) on December 31, 2020 and blocked Flash content from running in Flash Player beginning January 12, 2021. We have decided to deprecate and remove the [Flash](https://ckeditor.com/cke4/addon/flash) plugin from CKEditor 4 to help protect users' systems and discourage using insecure software. New Features: * [#3433](https://github.com/ckeditor/ckeditor4/issues/3433): Marked required fields in dialogs with asterisk (`*`) symbol. * [#4374](https://github.com/ckeditor/ckeditor4/issues/4374): Integrated the [Maximize](https://ckeditor.com/cke4/addon/maximize) plugin with browser's History API. * [#4461](https://github.com/ckeditor/ckeditor4/issues/4461): Introduced the possibility to delay editor initialization while it is in a detached DOM element. * [#4462](https://github.com/ckeditor/ckeditor4/issues/4462): Introduced support for reattaching editor container element to DOM. * [#4612](https://github.com/ckeditor/ckeditor4/issues/4612): Allow pasting images as Base64 from [clipboard](https://ckeditor.com/cke4/addon/clipboard) in all browsers except IE. * [#4681](https://github.com/ckeditor/ckeditor4/issues/4681): Allow drag and drop images as Base64. * [#4750](https://github.com/ckeditor/ckeditor4/issues/4750): Added notification for pasting and dropping unsupported file types into the editor. * [#4807](https://github.com/ckeditor/ckeditor4/issues/4807): [Chrome] Improved the performance of pasting large images. Thanks to [FlowIT-JIT](https://github.com/FlowIT-JIT)! * [#4850](https://github.com/ckeditor/ckeditor4/issues/4850): Added support for loading [content templates](https://ckeditor.com/cke4/addon/templates) from HTML files. Thanks to [Fynn96](https://github.com/Fynn96)! * [#4874](https://github.com/ckeditor/ckeditor4/issues/4874): Added the [`config.clipboard_handleImages`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html#cfg-clipboard_handleImages) configuration option for enabling and disabling built-in support for pasting and dropping images in the [Clipboard](https://ckeditor.com/cke4/addon/clipboard) plugin. Thanks to [FlowIT-JIT](https://github.com/FlowIT-JIT)! * [#4026](https://github.com/ckeditor/ckeditor4/issues/4026): [Preview](https://ckeditor.com/cke4/addon/preview) plugin now uses the [`editor#title`](http://localhost/ckeditor4-docs/build/docs/ckeditor4/latest/api/CKEDITOR_editor.html#property-title) property for the title of the preview window. Thanks to [Ely](https://github.com/Elyasin)! * [#4467](https://github.com/ckeditor/ckeditor4/issues/4467): Added support for inserting content next to a block [widgets](https://ckeditor.com/cke4/addon/widget) using keyboard navigation. Thanks to [bunglegrind](https://github.com/bunglegrind)! Fixed Issues: * [#3757](https://github.com/ckeditor/ckeditor4/issues/3757): [Firefox] Fixed: images pasted from [clipboard](https://ckeditor.com/cke4/addon/clipboard) are not inserted as Base64-encoded images. * [#3876](https://github.com/ckeditor/ckeditor4/issues/3876): Fixed: The [Print](https://ckeditor.com/cke4/addon/print) plugin incorrectly prints links and images. * [#4444](https://github.com/ckeditor/ckeditor4/issues/4444): [Firefox] Fixed: Print preview is incorrectly loaded from CDN. * [#4596](https://github.com/ckeditor/ckeditor4/issues/4596): Fixed: Incorrect handling of HSL/HSLA values in [`CKEDITOR.tools.color`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_tools_color.html). * [#4597](https://github.com/ckeditor/ckeditor4/issues/4597): Fixed: Incorrect color conversion for HSL/HSLA values in [`CKEDITOR.tools.color`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_tools_color.html). * [#4604](https://github.com/ckeditor/ckeditor4/issues/4604): Fixed: [`CKEDITOR.plugins.clipboard.dataTransfer#getTypes()`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_plugins_clipboard_dataTransfer.html#method-getTypes) returns no types. * [#4761](https://github.com/ckeditor/ckeditor4/issues/4761): Fixed: Not all resources loaded by the editor respect the cache key. * [#4783](https://github.com/ckeditor/ckeditor4/issues/4783): Fixed: The [Accessibility Help](https://ckeditor.com/cke4/addon/a11yhelp) dialog does not contain info about focus being moved back to the editing area upon activating a toolbar button. * [#4790](https://github.com/ckeditor/ckeditor4/issues/4790): Fixed: Printing page is invoked before the printed page is fully loaded. * [#4874](https://github.com/ckeditor/ckeditor4/issues/4874): Fixed: Built-in support for pasting and dropping images in the [Clipboard](https://ckeditor.com/cke4/addon/clipboard) plugin restricts third party plugins from handling image pasting. Thanks to [FlowIT-JIT](https://github.com/FlowIT-JIT)! * [#4888](https://github.com/ckeditor/ckeditor4/issues/4888): Fixed: The [`CKEDITOR.dialog#setState()`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_dialog.html#method-setState) method throws error when there is no "OK" button in the dialog. * [#4858](https://github.com/ckeditor/ckeditor4/issues/4858): Fixed: The [Autolink](https://ckeditor.com/cke4/addon/autolink) plugin incorrectly escapes the `&` characters when pasting links into the editor. * [#4892](https://github.com/ckeditor/ckeditor4/issues/4892): Fixed: Focus of buttons in dialogs is not visible enough in High Contrast mode. * [#3858](https://github.com/ckeditor/ckeditor4/issues/3858): Fixed: Pasting content in `ENTER_BR` [enter mode](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html#cfg-enterMode) crashes the editor. * [#4891](https://github.com/ckeditor/ckeditor4/issues/4891): Fixed: The [Autogrow](https://ckeditor.com/cke4/addon/autogrow) plugin applies fixed width to the editor. API Changes: * [#4462](https://github.com/ckeditor/ckeditor4/issues/4462): [`CKEDITOR.editor#getSelection()`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_editor.html#method-getSelection) now returns `null` if the editor is in recreating state. * [#4583](https://github.com/ckeditor/ckeditor4/issues/4583): Added support for new, comma-less color syntax to [`CKEDITOR.tools.color`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_tools_color.html). * [#4604](https://github.com/ckeditor/ckeditor4/issues/4604): Added the [`CKEDITOR.plugins.clipboard.dataTransfer#isFileTransfer()`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_plugins_clipboard_dataTransfer.html#method-isFileTransfer) method. * [#4790](https://github.com/ckeditor/ckeditor4/issues/4790): Added `callback` parameter to [`CKEDITOR.plugins.preview#createPreview()`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_plugins_preview.html#method-createPreview) method. Other Changes: * [#4866](https://github.com/ckeditor/ckeditor4/issues/#4866): The [Flash](https://ckeditor.com/cke4/addon/flash) plugin is now deprecated and has been removed from CKEditor 4. * [#4901](https://github.com/ckeditor/ckeditor4/issues/4901): Redesigned buttons placement in the [Content templates](https://ckeditor.com/cke4/addon/templates) dialog to make it more UX friendly. Thanks to [Fynn96](https://github.com/Fynn96)! ## CKEditor 4.16.2 **Security Updates:** * Fixed XSS vulnerability in the [Clipboard](https://ckeditor.com/cke4/addon/clipboard) plugin reported by [Anton Subbotin](https://github.com/skavans). Issue summary: The vulnerability allowed to abuse paste functionality using malformed HTML, which could result in injecting arbitrary HTML into the editor. See [security advisory](https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-7889-rm5j-hpgg) for more details. * Fixed XSS vulnerability in the [Widget](https://ckeditor.com/cke4/addon/widget) plugin reported by [Anton Subbotin](https://github.com/skavans). Issue summary: The vulnerability allowed to abuse undo functionality using malformed [Widget](https://ckeditor.com/cke4/addon/widget) HTML, which could result in executing JavaScript code. See [security advisory](https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-6226-h7ff-ch6c) for more details. * Fixed XSS vulnerability in the [Fake Objects](https://ckeditor.com/cke4/addon/fakeobjects) plugin reported by [Mika Kulmala](https://github.com/kulmik). Issue summary: The vulnerability allowed to inject malformed [Fake Objects](https://ckeditor.com/cke4/addon/fakeobjects) HTML, which could result in executing JavaScript code. See [security advisory](https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-m94c-37g6-cjhc) for more details. You can read more details in the relevant security advisory and [contact us](security@cksource.com) if you have more questions. **An upgrade is highly recommended!** Fixed Issues: * [#4777](https://github.com/ckeditor/ckeditor4/issues/4777): Fixed: HTML comments in widgets not processed correctly. * [#4733](https://github.com/ckeditor/ckeditor4/pull/4733): Fixed: [Link](https://ckeditor.com/cke4/addon/link) prevent duplicate anchors in text with styles. * [#4728](https://github.com/ckeditor/ckeditor4/issues/4728): Fixed: Multiple anchors in one line and multi-line with text style. * [#3863](https://github.com/ckeditor/ckeditor4/issues/3863): Fixed: Multiple anchors in single word with text style. * [#3819](https://github.com/ckeditor/ckeditor4/issues/3819): [Chrome] Fixed: After removing one of the two consecutive spaces, the ` ` character appears in the editor instead of a space. * [#4666](https://github.com/ckeditor/ckeditor4/pull/4666): [IE] Introduce CSS.escape polyfill. Thanks to [limingli0707](https://github.com/limingli0707)! * [#681](https://github.com/ckeditor/ckeditor4/issues/681): Fixed: Table elements (td, tr, th, ..) with an id that starts with dot (.) causes javascript runtime err. * [#641](https://github.com/ckeditor/ckeditor4/issues/641): Fixed: UploadImage Plugin Widgets not working in IE, Opera, Safari, PhantomJS. * [#3638](https://github.com/ckeditor/ckeditor4/issues/3638): Fixed: Opening the same dialog twice causes it to become hidden under the dialog's page cover. * [#4247](https://github.com/ckeditor/ckeditor4/issues/4247): Fixed: [Color Button](https://ckeditor.com/cke4/addon/colorbutton)'s incorrect rendering on the first opening. * [#4555](https://github.com/ckeditor/ckeditor4/issues/4555): Fixed: [Font](https://ckeditor.com/cke4/addon/font) styles with attributes are not applied correctly when used multiple times over the same selection. * [#4782](https://github.com/ckeditor/ckeditor4/issues/4782): [Firefox] Fixed: `TypeError` is thrown when switching to Source View and back while [Autocomplete](https://ckeditor.com/cke4/addon/autocomplete) plugin is enabled. ## CKEditor 4.16.1 Fixed Issues: * [#4617](https://github.com/ckeditor/ckeditor4/issues/4617): Fixed: [Autocomplete](https://ckeditor.com/cke4/addon/autocomplete) is not accessible in inline editors. * [#4493](https://github.com/ckeditor/ckeditor4/issues/4493): Fixed: The [drop-down](https://ckeditor.com/cke4/addon/richcombo) label does not reflect the current value of the drop-down. * [#1572](https://github.com/ckeditor/ckeditor4/issues/1572): Fixed: A paragraph before or after a [widget](https://ckeditor.com/cke4/addon/widget) cannot be removed. Thanks to [bunglegrind](https://github.com/bunglegrind)! * [#4301](https://github.com/ckeditor/ckeditor4/issues/4301): Fixed: Pasted content is overwritten when pasted in an initially empty editor with the [`div` Enter mode](https://ckeditor.com/docs/ckeditor4/latest/features/enterkey.html). * [#4351](https://github.com/ckeditor/ckeditor4/issues/4351): Fixed: Incorrect values for RGBA/HSLA colors in [Color Dialog](https://ckeditor.com/cke4/addon/colordialog). * [#4509](https://github.com/ckeditor/ckeditor4/issues/4509): Fixed: Incorrect handling of drag & drop inside [widgets](https://ckeditor.com/cke4/addon/widget) and nested editables. * [#4611](https://github.com/ckeditor/ckeditor4/issues/4611): [Android, iOS] Fixed: Incorrect hover styles for buttons in the toolbar on mobile devices. * [#4652](https://github.com/ckeditor/ckeditor4/issues/4652): Fixed: [Event data](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_eventInfo.html) set to `false` is treated as an event cancelation. * [#4659](https://github.com/ckeditor/ckeditor4/issues/4659): Fixed: [`CKEDITOR.htmlParser`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_htmlParser.html) does not treat `--!>` as a comment end tag correctly. ## CKEditor 4.16 **Security Updates:** * Fixed ReDoS vulnerability in the [Autolink](https://ckeditor.com/cke4/addon/autolink) plugin. Issue summary: It was possible to execute a ReDoS-type attack inside CKEditor 4 by persuading a victim to paste a specially crafted URL-like text into the editor and press Enter or Space. * Fixed ReDoS vulnerability in the [Advanced Tab for Dialogs](https://ckeditor.com/cke4/addon/dialogadvtab) plugin. Issue summary: It was possible to execute a ReDoS-type attack inside CKEditor 4 by persuading a victim to paste a specially crafted text into the Styles dialog. **An upgrade is highly recommended!** New Features: * [#2800](https://github.com/ckeditor/ckeditor4/issues/2800): Unsupported image formats are now gracefully handled by the [Paste from Word](https://ckeditor.com/cke4/addon/pastefromword) plugin on paste, additionally showing descriptive error messages. * [#2800](https://github.com/ckeditor/ckeditor4/issues/2800): Unsupported image formats are now gracefully handled by the [Paste from LibreOffice](https://ckeditor.com/cke4/addon/pastefromlibreoffice) plugin on paste, additionally showing descriptive error messages. * [#3582](https://github.com/ckeditor/ckeditor4/issues/3582): Introduced smart positioning of the [Autocomplete](https://ckeditor.com/cke4/addon/autocomplete) panel used by the [Mentions](https://ckeditor.com/cke4/addon/mentions) and [Emoji](https://ckeditor.com/cke4/addon/emoji) plugins. The panel will now be additionally positioned related to the browser viewport to be always fully visible. * [#4388](https://github.com/ckeditor/ckeditor4/issues/4388): Added the option to remove an iframe created with the [IFrame Dialog](https://ckeditor.com/cke4/addon/iframe) plugin from the sequential keyboard navigation using the `tabindex` attribute. Thanks to [Timo Kirkkala](https://github.com/kirkkala)! Fixed Issues: * [#1134](https://github.com/ckeditor/ckeditor4/issues/1134): [Safari] Fixed: [Paste from Word](https://ckeditor.com/cke4/addon/pastefromword) does not embed images. * [#2800](https://github.com/ckeditor/ckeditor4/issues/2800): Fixed: No images are imported from Microsoft Word when the content is pasted via the [Paste from Word](https://ckeditor.com/cke4/addon/pastefromword) plugin if there is at least one image of unsupported format. * [#4379](https://github.com/ckeditor/ckeditor4/issues/4379): [Edge] Fixed: Incorrect detection of the [high contrast mode](https://ckeditor.com/docs/ckeditor4/latest/guide/dev_a11y.html#high-contrast-mode). * [#4422](https://github.com/ckeditor/ckeditor4/issues/4422): Fixed: Missing space between the button name and the keyboard shortcut inside the button label in the [high contrast mode](https://ckeditor.com/docs/ckeditor4/latest/guide/dev_a11y.html#high-contrast-mode). * [#2208](https://github.com/ckeditor/ckeditor4/issues/2208): [IE] Fixed: The [Autolink](https://ckeditor.com/cke4/addon/autolink) plugin duplicates the native browser implementation. * [#1824](https://github.com/ckeditor/ckeditor4/issues/1824): Fixed: The [Autolink](https://ckeditor.com/cke4/addon/autolink) plugin should require the [Link](https://ckeditor.com/cke4/addon/link) plugin. * [#4253](https://github.com/ckeditor/ckeditor4/issues/4253): Fixed: The [Editor Placeholder](https://ckeditor.com/cke4/addon/editorplaceholder) plugin throws an error during the editor initialization with [`config.fullPage`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html#cfg-fullPage) enabled when there is no `
` tag in the editor content. * [#4372](https://github.com/ckeditor/ckeditor4/issues/4372): Fixed: The [Autogrow](https://ckeditor.com/cke4/addon/autogrow) plugin changes the editor's width when used with an absolute [`config.width`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html#cfg-width) value. API Changes: * [#4358](https://github.com/ckeditor/ckeditor4/issues/4358): Introduced the [`CKEDITOR.tools.color`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_tools_color.html) class which adds colors validation and methods for converting colors between various formats: named colors, HEX, RGB, RGBA, HSL and HSLA. * [#3782](https://github.com/ckeditor/ckeditor4/issues/3782): Moved the [`CKEDITOR.plugins.pastetools.filters.word.images`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_plugins_pastetools_filters_word_images.html) filters to the [`CKEDITOR.plugins.pastetools.filters.image`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_plugins_pastetools_filters_image.html) namespace. * [#4297](https://github.com/ckeditor/ckeditor4/issues/4297): All [`CKEDITOR.plugins.pastetools.filters`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_plugins_pastetools_filters.html) are now available under the [`CKEDITOR.pasteTools`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR.html#property-pasteTools) alias. * [#4394](https://github.com/ckeditor/ckeditor4/issues/4394): Introduced [`CKEDITOR.ajax`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_ajax.html) specialized loading methods for loading binary ([`CKEDITOR.ajax.loadBinary()`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_ajax.html#method-loadBinary)) and text ([`CKEDITOR.ajax.loadText()`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_ajax.html#method-loadText)) data. Other Changes: * The [WebSpellChecker](https://ckeditor.com/cke4/addon/wsc) (WSC) plugin is now disabled by default in [Standard and Full presets](https://ckeditor.com/cke4/presets). It can be enabled via [`extraPlugins`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html#cfg-extraPlugins) configuration option. ## CKEditor 4.15.1 **Security Updates:** * Fixed XSS vulnerability in the [Color History feature](https://ckeditor.com/docs/ckeditor4/latest/features/colorbutton.html#color-history) reported by [Mark Wade](https://github.com/mark-wade). Issue summary: It was possible to execute an XSS-type attack inside CKEditor 4 by persuading a victim to paste a specially crafted HTML code into the [Color Button](https://ckeditor.com/cke4/addon/colorbutton) dialog. **An upgrade is highly recommended!** Fixed Issues: * [#4293](https://github.com/ckeditor/ckeditor4/issues/4293): Fixed: The [`CKEDITOR.inlineAll()`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR.html#method-inlineAll) method tries to initialize inline editor also on elements with an editor already attached to them. * [#3961](https://github.com/ckeditor/ckeditor4/issues/3961): Fixed: The [Table Resize](https://ckeditor.com/cke4/addon/tableresize) plugin prevents editing of merged cells. * [#3649](https://github.com/ckeditor/ckeditor4/issues/3649): Fixed: Applying a [block format](https://ckeditor.com/docs/ckeditor4/latest/features/format.html) should remove existing block styles. * [#4282](https://github.com/ckeditor/ckeditor4/issues/4282): Fixed: The [script loader](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_scriptLoader.html) does not execute callback for scripts already loaded when called for the second time. Thanks to [Alexander Korotkevich](https://github.com/aldoom)! * [#4273](https://github.com/ckeditor/ckeditor4/issues/4273): Fixed: A memory leak in the [`CKEDITOR.domReady()`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR.html#method-domReady) method connected with not removing `load` event listeners. Thanks to [rohit1](https://github.com/rohit1)! * [#1330](https://github.com/ckeditor/ckeditor4/issues/1330): Fixed: Incomplete CSS margin parsing if an `auto` or `0` value is used. * [#4286](https://github.com/ckeditor/ckeditor4/issues/4286): Fixed: The [Auto Grow](https://ckeditor.com/cke4/addon/autogrow) plugin causes the editor width to be set to `0` on editor resize. * [#848](https://github.com/ckeditor/ckeditor4/issues/848): Fixed: Arabic text not being "bound" correctly when pasting. Thanks to [Thomas Hunkapiller](https://github.com/devoidfury) and [J. Ivan Duarte Rodríguez](https://github.com/jidrone-mbm)! API Changes: * [#3649](https://github.com/ckeditor/ckeditor4/issues/3649): Added a new [`stylesRemove`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_editor.html#event-stylesRemove) editor event. Other Changes: * [#4262](https://github.com/ckeditor/ckeditor4/issues/4262): Removed the global reference to the `stylesLoaded` variable. Thanks to [Levi Carter](https://github.com/swiftMessenger)! * Updated the [Export to PDF](https://ckeditor.com/cke4/addon/exportpdf) plugin to `1.0.1` version: * Improved external CSS support for [classic editor](https://ckeditor.com/docs/ckeditor4/latest/examples/classic.html) by handling exceptions and displaying convenient [error messages](https://ckeditor.com/docs/ckeditor4/latest/guide/dev_errors.html#exportpdf-stylesheets-incaccessible). ## CKEditor 4.15 New features: * [#3940](https://github.com/ckeditor/ckeditor4/issues/3940): Introduced the `colorName` property for customizing foreground and background styles in the [Color Button](https://ckeditor.com/cke4/addon/colorbutton) plugin via the [`config.colorButton_foreStyle`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html#cfg-colorButton_foreStyle) and [`config.colorButton_backStyle`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html#cfg-colorButton_backStyle) configuration options. * [#3793](https://github.com/ckeditor/ckeditor4/issues/3793): Introduced the [Editor Placeholder](https://ckeditor.com/cke4/addon/editorplaceholder) plugin. * [#1795](https://github.com/ckeditor/ckeditor4/issues/1795): The colors picked from the [Color Dialog](https://ckeditor.com/cke4/addon/colordialog) are now stored in the [Color Button](https://ckeditor.com/cke4/addon/colorbutton) palette and can be reused easily. * [#3783](https://github.com/ckeditor/ckeditor4/issues/3783): The colors used in the document are now displayed as a part of the [Color Button](https://ckeditor.com/cke4/addon/colorbutton) palette. Fixed Issues: * [#4060](https://github.com/ckeditor/ckeditor4/issues/4060): Fixed: The content inside a [widget](https://ckeditor.com/cke4/addon/widget) nested editable is escaped twice. * [#4183](https://github.com/ckeditor/ckeditor4/issues/4183): [Safari] Fixed: Incorrect image dimensions when using the [Easy Image](https://ckeditor.com/cke4/addon/easyimage) plugin alongside the [IFrame Editing Area](https://ckeditor.com/cke4/addon/wysiwygarea) plugin. * [#3693](https://github.com/ckeditor/ckeditor4/issues/3693): Fixed: Incorrect default values for several [Color Button](https://ckeditor.com/cke4/addon/colorbutton) configuration variables in the API documentation. * [#3795](https://github.com/ckeditor/ckeditor4/issues/3795): Fixed: Setting the [`config.dataIndentationChars`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html#cfg-dataIndentationChars) configuration option to an empty string is ignored and replaced by a tab (`\t`) character. Thanks to [Thomas Grinderslev](https://github.com/Znegl)! * [#4107](https://github.com/ckeditor/ckeditor4/issues/4107): Fixed: Multiple [Autocomplete](https://ckeditor.com/cke4/addon/autocomplete) instances cause keyboard navigation issues. * [#4041](https://github.com/ckeditor/ckeditor4/issues/4041): Fixed: The[`selection.scrollIntoView`](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_dom_selection.html#method-scrollIntoView) method throws an error when the editor selection is not set. * [#3361](https://github.com/ckeditor/ckeditor4/issues/3361): Fixed: Loading multiple [custom editor configurations](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_config.html#cfg-customConfig) is prone to a race condition between these. * [#4007](https://github.com/ckeditor/ckeditor4/issues/4007): Fixed: Screen readers do not announce the [Rich Combo](https://ckeditor.com/cke4/addon/richcombo) plugin is collapsed or expanded. * [#4141](https://github.com/ckeditor/ckeditor4/issues/4141): Fixed: The styles are incorrectly applied when there is a `