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[email protected]CVE-2021-21391

HistoryApr 29, 2021 - 1:15 a.m.

CVE-2021-21391

2021-04-2901:15:07

CWE-400

[email protected]

web.nvd.nist.gov

cve

2021

21391

ckeditor 5

npm packages

redos vulnerability

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

0.005 Low

EPSS

Percentile

76.0%

JSON

CKEditor 5 provides a WYSIWYG editing solution. This CVE affects the following npm packages: ckeditor5-engine, ckeditor5-font, ckeditor5-image, ckeditor5-list, ckeditor5-markdown-gfm, ckeditor5-media-embed, ckeditor5-paste-from-office, and ckeditor5-widget. Following an internal audit, a regular expression denial of service (ReDoS) vulnerability has been discovered in multiple CKEditor 5 packages. The vulnerability allowed to abuse particular regular expressions, which could cause a significant performance drop resulting in a browser tab freeze. It affects all users using the CKEditor 5 packages listed above at version <= 26.0.0. The problem has been recognized and patched. The fix will be available in version 27.0.0.

Affected configurations

Vulners

NVD

Node

ckeditorckeditor5Range<27.0.0

VendorProductVersionCPE
ckeditorckeditor5*cpe:2.3:a:ckeditor:ckeditor5:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
ckeditor	ckeditor5	*	cpe:2.3:a:ckeditor:ckeditor5::::::::

CNA Affected

[
  {
    "product": "ckeditor5",
    "vendor": "ckeditor",
    "versions": [
      {
        "status": "affected",
        "version": "< 27.0.0"
      }
    ]
  }
]