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GHSA-6226-h7ff-ch6c

Widget feature vulnerability allowing to execute JavaScript code using undo functionality

Source: GitHub Advisory Database (reviewed) High CVE-2021-32808

Packages

EcosystemPackageAffectedFixed in
npm ckeditor4 >= 4.13.0, < 4.16.2 4.16.2

Details

As written in the advisory (Markdown source, shown as plain text).

### Affected packages The vulnerability has been discovered in [Widget](https://ckeditor.com/cke4/addon/clipboard) plugin if used alongside [Undo](https://ckeditor.com/cke4/addon/undo) feature. ### Impact A potential vulnerability has been discovered in CKEditor 4 [Widget](https://ckeditor.com/cke4/addon/widget) package. The vulnerability allowed to abuse undo functionality using malformed widget HTML, which could result in executing JavaScript code. It affects all users using the CKEditor 4 plugins listed above at version >= 4.13.0. ### Patches The problem has been recognized and patched. The fix will be available in version 4.16.2. ### For more information Email us at [email protected] if you have any questions or comments about this advisory. ### Acknowledgements The CKEditor 4 team would like to thank Anton Subbotin ([skavans](https://github.com/skavans)) for recognizing and reporting this vulnerability.

References

External links from the advisory. They lead to third-party sites.