GHSA-m94c-37g6-cjhc

### Affected packages The vulnerability has been discovered in [Fake Objects](https://ckeditor.com/cke4/addon/fakeobjects) plugin. All plugins with [Fake Objects](https://ckeditor.com/cke4/addon/fakeobjects) plugin dependency are affected:

* [Fake Objects](https://ckeditor.com/cke4/addon/fakeobjects) * [Link](https://ckeditor.com/cke4/addon/link) * [Flash](https://ckeditor.com/cke4/addon/flash) * [Iframe](https://ckeditor.com/cke4/addon/iframe) * [Forms](https://ckeditor.com/cke4/addon/forms) * [Page Break](https://ckeditor.com/cke4/addon/pagebreak)

### Impact A potential vulnerability has been discovered in CKEditor 4 [Fake Objects](https://ckeditor.com/cke4/addon/fakeobjects) package. The vulnerability allowed to inject malformed Fake Objects HTML, which could result in executing JavaScript code. It affects all users using the CKEditor 4 plugins listed above at version < 4.16.2.

### Patches The problem has been recognized and patched. The fix will be available in version 4.16.2.

### For more information Email us at security@cksource.com if you have any questions or comments about this advisory.

### Acknowledgements The CKEditor 4 team would like to thank Mika Kulmala ([kulmik](https://github.com/kulmik)) for recognizing and reporting this vulnerability.