medium6.5
CVE-2021-21254
CKEditor 5 is an open source rich text editor framework with a modular architecture.
Impact
CKEditor 5 is an open source rich text editor framework with a modular architecture. The CKEditor 5 Markdown plugin (@ckeditor/ckeditor5-markdown-gfm) before version 25.0.0 has a regex denial of service (ReDoS) vulnerability. The vulnerability allowed to abuse link recognition regular expression, which could cause a significant performance drop resulting in browser tab freeze. It affects all users using CKEditor 5 Markdown plugin at version <= 24.0.0. The problem has been recognized and patched. The fix will be available in version 25.0.0.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Ckeditor | Ckeditor5 | before 25.0.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/ckeditor/ckeditor5/releases/tag/v25.0.0
- https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-hgmg-hhc8-g5wr
- https://www.npmjs.com/package/%40ckeditor/ckeditor5-markdown-gfm
- https://github.com/ckeditor/ckeditor5/releases/tag/v25.0.0
- https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-hgmg-hhc8-g5wr
- https://www.npmjs.com/package/%40ckeditor/ckeditor5-markdown-gfm