Regular expression Denial of Service in multiple packages
### Impact A regular expression denial of service (ReDoS) vulnerability has been discovered in multiple CKEditor 5 packages. The vulnerability allowed to abuse particular regular expressions, which could cause a significant performance drop resulting in a browser tab freeze. It affects all users using the CKEditor 5 packages listed above at version <= 26.0.0. ### Patches The problem has been recognized and patched. The fix will be available in version 27.0.0. ### For more information Email us at security@cksource.com if you have any questions or comments about this advisory. ### Acknowledgements The CKEditor 5 team would like to thank Yeting Li for recognizing and reporting these vulnerabilities.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2021-21391US | medium6.5 | — | ||
CKEditor 5 provides a WYSIWYG editing solution. This CVE affects the following npm packages: ckeditor5-engine, ckeditor5-font, ckeditor5-image, ckeditor5-list, ckeditor5-markdown-g… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/ckeditor/ckeditor5/releases/tag/v27.0.0WEB
- https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-3rh3-wfr4-76mjWEB
- https://nvd.nist.gov/vuln/detail/CVE-2021-21391ADVISORY
- https://www.npmjs.com/package/@ckeditor/ckeditor5-engineWEB
- https://www.npmjs.com/package/@ckeditor/ckeditor5-fontWEB
- https://www.npmjs.com/package/@ckeditor/ckeditor5-imageWEB
- https://www.npmjs.com/package/@ckeditor/ckeditor5-listWEB
- https://www.npmjs.com/package/@ckeditor/ckeditor5-markdown-gfmWEB
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