CVE-2021-21254
6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| ckeditor | ckeditor5 | < 25.0.0 | affected |
Weaknesses
- CWE-400: CWE-400 Uncontrolled Resource Consumption
ADP Enrichment
CVE Program Container
Additional References
- https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-hgmg-hhc8-g5wr
- https://github.com/ckeditor/ckeditor5/releases/tag/v25.0.0
- https://www.npmjs.com/package/%40ckeditor/ckeditor5-markdown-gfm
References
- https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-hgmg-hhc8-g5wr
- https://github.com/ckeditor/ckeditor5/releases/tag/v25.0.0
- https://www.npmjs.com/package/%40ckeditor/ckeditor5-markdown-gfm
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