CKEditor4 Cross-site Scripting vulnerability in samples with enabled the preview feature
### Affected packages
The vulnerability has been discovered in the samples that use the preview
https://ckeditor.com/cke4/addon/preview feature:
* `samples/old/**/*.html`
* `plugins/[plugin name]/samples/**/*.html`
All integrators that use these samples in the production code can be affected.
### Impact
A potential vulnerability has been discovered in one of CKEditor's 4 samples that are shipped with production code. The vulnerability allowed to execute JavaScript code by abusing the misconfigured preview feature
https://ckeditor.com/cke4/addon/preview. It affects all users using the CKEditor 4 at version < 4.24.0-lts with affected samples used in a production environment.
### Patches
The problem has been recognized and patched. The fix will be available in version 4.24.0-lts.
### For more information
Email us at [security@cksource.com](mailto:security@cksource.com) if you have any questions or comments about this advisory.
### Acknowledgements
The CKEditor 4 team would like to thank Marcin Wyczechowski
https://www.linkedin.com/in/marcin-wyczechowski-0a823795/ & Michał Majchrowicz
https://www.linkedin.com/in/micha%C5%82-majchrowicz-mwsc/ AFINE Team
https://afine.com/ for recognizing and reporting this vulnerability.