Medium, CVSS 5.8npmAmendedPublished
CKEditor5 cross-site scripting vulnerability caused by the editor instance destroying process
CVE-2022-31175 · GHSA-42wq-rch8-6f6j
- Affected
- npm @ckeditor/ckeditor5-html-embed < 35.0.1
- Fixed in
- 35.0.1· Vendor fix available
- Issue
- Affected packages @ckeditor/ckeditor5-markdown-gfm @ckeditor/ckeditor5-html-support @ckeditor/ckeditor5-html-embed Impact A cross-site scripting vulnerability has been discovered affecting three optional CKEditor 5's packages. The vulnerability allowed to trigger a JavaScript code after fulfilling special conditions: a) Using one of the affected packages. In case of ckeditor5-html-support and ckeditor5-html-embed, additionally, it was required to use a configuration that allows unsafe markup inside the editor, b) Initializing the editor on an element and using an element other than <textarea as a base, c) Destroying the editor instance. The root cause of the issue was a mechanism responsible for updating the source element with the markup coming from the CKEditor 5 data pipeline after destroying the editor. This vulnerability might affect a small percent of integrators that depend on dynamic editor initialization/destroy and use Markdown, General HTML Support or HTML embed features.…
Recommended action: Upgrade to 35.0.1 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.