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.
Published: 2021-01-29
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-0505 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.
Github GHSA Github GHSA GHSA-hgmg-hhc8-g5wr CKEditor 5 Markdown plugin Regular expression Denial of Service
History

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Subscriptions

Ckeditor Ckeditor5
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2024-08-03T18:09:14.916Z

Reserved: 2020-12-22T00:00:00.000Z

Link: CVE-2021-21254

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-01-29T22:15:14.797

Modified: 2024-11-21T05:47:52.287

Link: CVE-2021-21254

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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Weaknesses