CVE-2022-31175 – @ckeditor/ckeditor5-html-support

Package

Manager: npm
Name: @ckeditor/ckeditor5-html-support
Vulnerable Version: >=0 <35.0.1

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L

CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

EPSS: 0.00844 pctl0.73914

Details

CKEditor5 cross-site scripting vulnerability caused by the editor instance destroying process ### 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](https://ckeditor.com/docs/ckeditor5/latest/features/markdown.html), [General HTML Support](https://ckeditor.com/docs/ckeditor5/latest/features/general-html-support.html) or [HTML embed](https://ckeditor.com/docs/ckeditor5/latest/features/html-embed.html) features. ### Patches The problem has been recognized and patched. The fix will be available in version 35.0.1. ### For more information Email us at [security@cksource.com](mailto:security@cksource.com) if you have any questions or comments about this advisory.

Metadata

Created: 2022-08-06T09:40:43Z
Modified: 2022-08-11T18:08:35Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/08/GHSA-42wq-rch8-6f6j/GHSA-42wq-rch8-6f6j.json
CWE IDs: ["CWE-79"]
Alternative ID: GHSA-42wq-rch8-6f6j
Finding: F008
Auto approve: 1