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ckeditor4 vulnerable to cross-site scripting

Moderate severity GitHub Reviewed Published Jun 21, 2021 to the GitHub Advisory Database • Updated Feb 8, 2024

Package

npm ckeditor4 (npm)

Affected versions

>= 4.14.0, < 4.16.1

Patched versions

4.16.1
composer drupal/core (Composer)
>= 7.0.0, < 7.80
>= 8.0.0, < 8.9.16
>= 9.0.0, < 9.0.14
>= 9.1.0, < 9.1.9
7.80
8.9.16
9.0.14
9.1.9
composer drupal/drupal (Composer)
>= 7.0.0, < 7.80
>= 8.0.0, < 8.9.16
>= 9.0.0, < 9.0.14
>= 9.1.0, < 9.1.9
7.80
8.9.16
9.0.14
9.1.9

Description

A cross-site scripting (XSS) vulnerability in the HTML Data Processor in CKEditor 4 4.14.0 through 4.16.x before 4.16.1 allows remote attackers to inject executable JavaScript code through a crafted comment because --!> is mishandled.

References

Published by the National Vulnerability Database Jun 9, 2021
Reviewed Jun 14, 2021
Published to the GitHub Advisory Database Jun 21, 2021
Last updated Feb 8, 2024

Severity

Moderate
6.1
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weaknesses

CVE ID

CVE-2021-33829

GHSA ID

GHSA-rgx6-rjj4-c388

Source code

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