CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L
EPSS
Percentile
39.4%
@ckeditor/ckeditor5-markdown-gfm
@ckeditor/ckeditor5-html-support
@ckeditor/ckeditor5-html-embed
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.
The problem has been recognized and patched. The fix will be available in version 35.0.1.
Email us at [email protected] if you have any questions or comments about this advisory.
ckeditor.com/docs/ckeditor5/latest/features/general-html-support.html
ckeditor.com/docs/ckeditor5/latest/features/html-embed.html
ckeditor.com/docs/ckeditor5/latest/features/markdown.html
github.com/ckeditor/ckeditor5
github.com/ckeditor/ckeditor5/security/advisories/GHSA-42wq-rch8-6f6j
nvd.nist.gov/vuln/detail/CVE-2022-31175