Regular expression Denial of Service in Markdown plugin
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
@ckeditor/ckeditor5-markdown-gfmnpm | < 25.0.0 | 25.0.0 |
Affected products
2Patches
Vulnerability mechanics
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References
6- github.com/advisories/GHSA-hgmg-hhc8-g5wrghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-21254ghsaADVISORY
- github.com/ckeditor/ckeditor5/releases/tag/v25.0.0ghsax_refsource_MISCWEB
- github.com/ckeditor/ckeditor5/security/advisories/GHSA-hgmg-hhc8-g5wrghsax_refsource_CONFIRMWEB
- www.npmjs.com/package/%40ckeditor/ckeditor5-markdown-gfmmitrex_refsource_MISC
- www.npmjs.com/package/@ckeditor/ckeditor5-markdown-gfmghsaWEB
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