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MEDIUM6.1

GHSA-mw2c-vx6j-mg76

CKEditor4 Cross-site Scripting vulnerability in samples with enabled the preview feature

Quick fix

GHSA-mw2c-vx6j-mg76 — ckeditor4: upgrade to the fixed version with the command below.

npm install ckeditor4@4.24.0-lts

Details

### 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.

Are you affected?

Enter the version of the package you're using.

Affected packages

npm/ckeditor4
Introduced in: 0Fixed in: 4.24.0-lts
Fixnpm install ckeditor4@4.24.0-lts

References