CVE-2021-21254 (GCVE-0-2021-21254)

Vulnerability from cvelistv5 – Published: 2021-01-29 21:55 – Updated: 2024-08-03 18:09
VLAI
Title
Regular expression Denial of Service in Markdown plugin
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.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7838 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
ckeditor ckeditor5 Affected: < 25.0.0
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "ckeditor: Denial of service in link recognition regular expression",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-21254.json",
      "version": "3"
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}



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