Impact During a recent internal audit, we identified a Cross-Site Scripting (XSS) vulnerability in the CKEditor 5 clipboard package. This vulnerability could be triggered by a specific user action, leading to unauthorized JavaScript code execution, if the attacker managed to insert a malicious content into the editor, which might happen with a very specific editor configuration.
This vulnerability affects only installations where the editor configuration meets the following criteria:
1. The Block Toolbar plugin is enabled. 1. One of the following plugins is also enabled: - General HTML Support with a configuration that permits unsafe markup. - HTML Embed.
Patches The problem has been recognized and patched. The fix will be available in version 43.1.1 (and above), and explicitly in version 41.3.2.
Workarounds It's highly recommended to update to the version 43.1.1 or higher. However, if the update is not an option, we recommend disabling the block toolbar plugin.
For more information Email us at security@cksource.com if you have any questions or comments about this advisory.
Unspecified vulnerability in the CKeditor module 6.x-2.x before 6.x-2.3 and the CKEditor module 6.x-1.x before 6.x-1.9 and 7.x-1.x before 7.x-1.7 for Drupal, when the core PHP module is enabled, allows remote authenticated users or remote attackers to execute arbitrary PHP code via the text parameter to a text filter. NOTE: some of these details are obtained from third party information.
CKEditor 5 provides a WYSIWYG editing solution. This CVE affects the following npm packages: ckeditor5-engine, ckeditor5-font, ckeditor5-image, ckeditor5-list, ckeditor5-markdown-gfm, ckeditor5-media-embed, ckeditor5-paste-from-office, and ckeditor5-widget. Following an internal audit, a regular expression denial of service (ReDoS) vulnerability has been discovered in multiple CKEditor 5 packages. The vulnerability allowed to abuse particular regular expressions, which could cause a significant performance drop resulting in a browser tab freeze. It affects all users using the CKEditor 5 packages listed above at version <= 26.0.0. The problem has been recognized and patched. The fix will be available in version 27.0.0.
CKEditor 5 is an open source rich text editor framework with a modular architecture. The CKEditor 5 Markdown plugin (@ckeditor/ckeditor5-markdown-gfm) before version 25.0.0 has a regex denial of service (ReDoS) vulnerability. The vulnerability allowed to abuse link recognition regular expression, which could cause a significant performance drop resulting in browser tab freeze. It affects all users using CKEditor 5 Markdown plugin at version <= 24.0.0. The problem has been recognized and patched. The fix will be available in version 25.0.0.
The Open Link is a CKEditor plugin, extending context menu with a possibility to open link in a new tab. The vulnerability allowed to execute JavaScript code by abusing link href attribute. It affects all users using the Open Link plugin at version < 1.0.5.
ckeditor-plugin-openlink is a plugin for the CKEditor JavaScript text editor that extends the context menu with a possibility to open a link in a new tab. A vulnerability in versions of the plugin prior to 1.0.7 allowed a user to execute JavaScript code by abusing the link href attribute. The fix is available starting with version 1.0.7.
The ckeditor-for-wordpress plugin before 4.5.3.1 for WordPress has reflected XSS in the "built-in (old)" file browser.
pandao Editor.md 1.5.0 allows XSS via the Javascript: string.
Cross-site scripting (XSS) vulnerability in the Link package for CKEditor 5 before 10.0.1 allows remote attackers to inject arbitrary web script through a crafted href attribute of a link (A) element.
Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-wh5w-82f3-wrxh. This link is maintained to preserve external references.
Original Description A Cross-Site scripting vulnerability has been found in CKSource CKEditor affecting versions 4.15.1 and earlier. An attacker could send malicious javascript code through the /ckeditor/samples/old/ajax.html file and retrieve an authorized user's information.
Cross-site scripting (XSS) vulnerability in the printtextinputsvar function in editor/dialog/fckspellerpages/spellerpages/server-scripts/spellchecker.php in FCKeditor 2.6.7 and earlier allows remote attackers to inject arbitrary web script or HTML via textinputs array parameters.
Cross-site scripting (XSS) vulnerability in the FCKeditor module 6.x-2.x before 6.x-2.3 and the CKEditor module 6.x-1.x before 6.x-1.9 and 7.x-1.x before 7.x-1.7 for Drupal allows remote authenticated users or remote attackers to inject arbitrary web script or HTML via unspecified vectors.