Detections
Analytics

SCA: security update for @ckeditor/ckeditor5-engine, @ckeditor/ckeditor5-font, @ckeditor/ckeditor5-image, @ckeditor/ckeditor5-list, @ckeditor/ckeditor5-markdown-gfm, @ckeditor/ckeditor5-media-embed, @ckeditor/ckeditor5-paste-from-office, @ckeditor/ckeditor5-widget (GHSA-3rh3-wfr4-76mj)

medium Tenable Self-Hosted Container Security Plugin ID 409680

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2021-21391)

See Also

https://github.com/advisories/GHSA-3rh3-wfr4-76mj

Plugin Details

Severity: Medium

ID: 409680

Version: Revision 1.4

Type: Local

Family: SCA Checks

Published: 1/23/2025

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2021-21391

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 4/6/2021

Vulnerability Publication Date: 4/6/2021

Reference Information

CVE: CVE-2021-21391

cwe: CWE-400