ckeditor4 - npm Package Versions

CKEditor 4.25.1-lts

⚠️️️ Please note that this release is a part of CKEditor 4 Extended Support Model, only available to customers who decided to acquire the LTS (Long Term Support) version of the editor.

Other Changes:

• Updated license headers to 2025.
• Updated readme files to reflect the new CKEditor 4 Extended Support Model end date.

Please note that this patch release doesn't provide any security fixes. It's a part of our administrative maintenance updates.

CKEditor 4.25.0-lts

⚠️️️ Please note that this release is a part of CKEditor 4 Extended Support Model, only available to customers who decided to acquire the LTS (Long Term Support) version of the editor. All editor versions below 4.25.0-lts can no longer be considered as secure! ⚠️

Security Updates:

• Fixed reflected cross-site scripting (XSS) vulnerability in Code Snippet GeSHi plugin reported by Jiasheng He from Qihoo 360.

  Issue summary: The vulnerability allowed a reflected XSS attack by exploiting a flaw in the GeSHi syntax highlighter library hosted by the victim. The GeSHi library was included as a vendor dependency in CKEditor 4 source files. In a specific scenario, an attacker could craft a malicious script that could be executed by sending a request to the GeSHi library hosted on a PHP web server. See GHA for more details.

• Fixed low-risk cross-site scripting (XSS) vulnerability linked to potential domain takeover

  Issue summery: A theoretical vulnerability has been identified in CKEditor 4.22 (and above). In a highly unlikely scenario where an attacker gains control over the https://cke4.ckeditor.com domain, they could potentially execute an attack on CKEditor 4 instances. Although the vulnerability is purely hypothetical, we have addressed it in CKEditor 4.25.0-lts to ensure compliance with security best practices. See GHA for more details.

You can read more details in the relevant security advisories. Contact us if you have more questions.

An upgrade is highly recommended!

Updated dependencies:

• CodeMirror (used only in the Toolbar Configurator in samples) has been updated to v5.65.17 for improved stability and performance.

• Highlight.js (used by the Code Snippet plugin) has been updated to v11.9.0, introducing two breaking changes:

  • dropped support for Internet Explorer,
  • updated list of the supported themes – some of the themes are no longer officially supported, others may have their names changed (e.g. monokai_sublime is now monokai-sublime). Please verify the value of your config.codeSnippet_theme configuration option and adjust theme names as needed. The list of available themes can be checked in the plugins/codesnippet/lib/highlight/styles directory.

CKEditor 4.24.0-lts

⚠️️️ Please note that this release is a part of CKEditor 4 Extended Support Model, only available to customers who decided to acquire the LTS (Long Term Support) version of the editor. All editor versions below 4.24.0-lts can no longer be considered as secure! ⚠️

Security Updates:

• Fixed cross-site scripting (XSS) vulnerability caused by incorrect CDATA detection reported by Michal Frýba, ALEF NULA.

  Issue summary: The vulnerability allowed to inject malformed HTML content bypassing Advanced Content Filtering mechanism, which could result in executing JavaScript code. See GHA for more details.

• Fixed cross-site scripting (XSS) vulnerability in AJAX sample reported by Rafael Pedrero, see INCIBE report.

  Issue summary: The vulnerability allowed to execute JavaScript code by abusing the AJAX sample. See GHA for more details.

• Cross-site scripting (XSS) vulnerability in samples with enabled the preview feature reported by Marcin Wyczechowski & Michał Majchrowicz AFINE Team.

  Issue summary: The vulnerability allowed to execute JavaScript code by abusing the misconfigured preview feature. See GHA for more details.

You can read more details in the relevant security advisories. Contact us if you have more questions.

An upgrade is highly recommended!

Fixed Issues:

• Fixed: The CDATA parsing mechanism incorrectly detects the end of CDATA content. This fix unifies how style and script elements are parsed with the browser's behavior.

CKEditor 4.23.0-lts

This release introduces the LTS (”Long Term Support”) version of the editor, available under commercial terms ("Extended Support Model").

If you acquired the Extended Support Model for CKEditor 4 LTS, please read the CKEditor 4 LTS key activation guide.

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: Added vertical margins support for list elements in the Paste from Word plugin.
• #5410: Added the ability to indicate the language of styles in the Styles Combo plugin via the config.styleSet configuration option.
• #5510: Added notification system to the editor informing users that the editor version is up-to-date and secure. See config.versionCheck configuration option to learn more.

Fixed Issues:

• #5437: Fixed: Incorrect indication of selected items in combo boxes. The selected item was unmarked upon each opening of the combo box.
• #5495: Fixed: Insufficient color ratio for links inside Notifications.

Other Changes:

• #5412: Prevent using document.domain in Firefox in the Preview plugin.

Note: CKEditor 4.22.1 has been released immediately after 4.22.0 to fix the README issues on npm and contains no changes vs 4.22.0.

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: Added vertical margins support for list elements in the Paste from Word plugin.
• #5410: Added the ability to indicate the language of styles in the Styles Combo plugin via the config.styleSet configuration option.
• #5510: Added notification system to the editor informing users that the editor version is up-to-date and secure. See config.versionCheck configuration option to learn more.

Fixed Issues:

• #5437: Fixed: Incorrect indication of selected items in combo boxes. The selected item was unmarked upon each opening of the combo box.
• #5495: Fixed: Insufficient color ratio for links inside Notifications.

Other Changes:

• #5412: Prevent using document.domain in Firefox in the Preview plugin.

Note: CKEditor 4.22.1 has been released immediately after 4.22.0 to fix the README issues on npm 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 and Media Embed plugins.

This vulnerability might affect a small percentage of integrators that depend on dynamic editor initialization/destroy mechanism. See GitHub advisory 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 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 option.
• Starting from version 4.21, the Media Embed plugin regenerates the entire content of the embed widget by default. To change this behavior, configure the config.embed_keepOriginalContent option.

If you choose to change either of the above options, make sure to properly configure Content Security Policy 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 if you have more questions.

An upgrade is highly recommended!

New Features:

• #4400: Added the config.uploadImage_supportedTypes configuration option allowing to change the image formats accepted by the Upload Image plugin. Thanks to SilverYoCha!

Fixed Issues:

• #5431: Fixed: No notification is shown when pasting or dropping unsupported image types into the editor.

CKEditor 4.20.2

Fixed Issues:

• #439: Fixed: Incorrect <kbd>Tab</kbd> and <kbd>Shift</kbd>+<kbd>Tab</kbd> navigation for radio buttons inside the dialog.
• #4829: Fixed: Undo reversed entire table content instead of a single cell. Thanks to that fix, multiple changes in a table can be undone one by one.
• #5396: Fixed: Event listeners for popstate and hashchange events on the window, added by the Maximize plugin, were not removed when destroying the editor instance.
• #5414: Fixed: File and image uploaders based on the Upload Widget plugin and Easy Image plugin didn't fire the change event upon finishing upload, resulting in passing incorrect data in form controls for integration frameworks, like Reactive forms in Angular.
• #698: Fixed: An error was thrown after applying formatting to the widget with inline editable and switching to the source mode. Thanks to Glen!

API changes:

• #3540: The startup data passed to the widget's command is now used to also populate the widget's template.
• #5352: Added the colorButton_contentsCss configuration option allowing to add custom CSS to the Color Button menu content. Thanks to mihilion!

CKEditor 4.20.1

Fixed Issues:

• #5333: Fixed: The original name of the uploaded image is not preserved by the Upload Image plugin if the Clipboard plugin has enabled image handling.
• #2881: Fixed: Changing table headers from "Both" to "First column" in the Table dialog does not change the first column cell correctly.
• #2996: Fixed: Table header "scope" attribute is incorrect for the "Headers: both" option in the Table dialog.
• #4802: Fixed: Tableselection caret moves to the previous cell after tabbing into the next cell and then removing its content.
• #5365: Fixed: The value of the config.baseFloatZIndex config variable is incorrectly applied to parent dialog when the child dialog is closed resulting in the dialog overlay covering up the dialog. Thanks to JenoDK!
• #5305: Fixed: Anchor name can invalidly include spaces.