Vulnerability CVE-2021-41164
Published: 2021-11-17

Description:
CKEditor4 is an open source WYSIWYG HTML editor. In affected versions a vulnerability has been discovered in the Advanced Content Filter (ACF) module and may affect all plugins used by CKEditor 4. The vulnerability allowed to inject malformed HTML bypassing content sanitization, which could result in executing JavaScript code. It affects all users using the CKEditor 4 at version < 4.17.0. The problem has been recognized and patched. The fix will be available in version 4.17.0.

Type:

CWE-79

 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'))

CVSS2 => (AV:N/AC:M/Au:S/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
3.5/10
2.9/10
6.8/10
Exploit range
Attack complexity
Authentication
Remote
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Drupal -> Drupal 
Ckeditor -> Ckeditor 

 References:
https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-pvmx-g8h5-cprj
https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-417
https://www.drupal.org/sa-core-2021-011
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