GHSA-rh54-vffm-5fvp CKEditor: Cross-site scripting (XSS) in the engine package

• npm ckeditor5: >= 45.0.0, < 47.7.4 → fixed in 47.7.4 • npm @ckeditor/ckeditor5-engine: >= 45.0.0, < 47.7.4 → fixed in 47.7.4 • npm ckeditor5: >= 48.0.0, < 48.5.1 → fixed in 48.5.1 • npm @ckeditor/ckeditor5-engine: >= 48.0.0, < 48.5.1 → fixed in 48.5.1

Impact A Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values. The underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5. Patches The problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS). For more information Email us at [email protected] if you have any questions or comments about this advisory.