Cross-Site Scripting Vulnerability in CKEditor 4 by CKSource
CVE-2021-33829

6.1MEDIUM

Key Information:

Vendor

Ckeditor

Status
Ckeditor
Vendor
CVE Published:
9 June 2021

What is CVE-2021-33829?

A vulnerability in the HTML Data Processor of CKEditor 4 allows remote attackers to execute arbitrary JavaScript code via a specially crafted comment. This issue arises from improper handling of the sequence --!>, potentially leading to severe security implications for web applications using affected versions of CKEditor. Users are advised to update to version 4.16.1 or later to mitigate this risk.

References

https://www.drupal.org/sa-core-2021-003
x_refsource_CONFIRM
https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibil...
x_refsource_MISC
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisoryx_refsource_FEDORA

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.