CVE-2021-21254
CVE-2021-21254 · Regular expression Denial of Service in Markdown plugin
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 6.5 · Medium · EPSS 1.8% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
ckeditor5
- Versions
- < 25.0.0: Affected
No fix published
@ckeditor/ckeditor5-markdown-gfm npm
- Affected ranges
- SEMVER: < 25.0.0
Update to 25.0.0