CVE-2022-31175
CKEditor5 cross-site scripting vulnerability caused by the editor instance destroying process
Impact
### 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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @ckeditor/ckeditor5-markdown-gfm | < 35.0.1 | 35.0.1 |
| npm | @ckeditor/ckeditor5-html-support | < 35.0.1 | 35.0.1 |
| npm | @ckeditor/ckeditor5-html-embed | < 35.0.1 | 35.0.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Ckeditor | Ckeditor5-Html-Embed | before 35.0.1 |
| Ckeditor | Ckeditor5-Html-Support | before 35.0.1 |
| Ckeditor | Ckeditor5-Markdown-Gfm | before 35.0.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://ckeditor.com/docs/ckeditor5/latest/features/general-html-support.html
- https://ckeditor.com/docs/ckeditor5/latest/features/html-embed.html
- https://ckeditor.com/docs/ckeditor5/latest/features/markdown.html
- https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-42wq-rch8-6f6j
- https://github.com/advisories/GHSA-42wq-rch8-6f6j
- https://nvd.nist.gov/vuln/detail/CVE-2022-31175