GHSA-6226-h7ff-ch6c Widget feature vulnerability allowing to execute JavaScript code using undo functionality

• npm ckeditor4: >= 4.13.0, < 4.16.2 → fixed in 4.16.2

Affected packages The vulnerability has been discovered in Widget plugin if used alongside Undo feature. Impact A potential vulnerability has been discovered in CKEditor 4 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) for recognizing and reporting this vulnerability.