CVE-2021-33829

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Una vulnerabilidad de tipo cross-site scripting (XSS) en el Procesador de Datos HTML en CKEditor versiones 4 4.14.0 hasta 4.16.x versiones anteriores a 4.16.1, permite a atacantes remotos inyectar código JavaScript ejecutable mediante un comentario diseñado porque -!> No es manejado apropiadamente

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-06-03 CVE Reserved
2021-06-09 CVE Published
2024-02-23 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (6)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2021/11/msg00007.html	Mailing List

URL	Date	SRC

URL	Date	SRC
https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser	2023-11-07
https://www.drupal.org/sa-core-2021-003	2023-11-07

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WAGNWHFIQAVCP537KFFS2A2GDG66J7XD	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Ckeditor Search vendor "Ckeditor"		Ckeditor Search vendor "Ckeditor" for product "Ckeditor"				>= 4.14.0 < 4.16.1 Search vendor "Ckeditor" for product "Ckeditor" and version " >= 4.14.0 < 4.16.1"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				35 Search vendor "Fedoraproject" for product "Fedora" and version "35"		-		Affected
Drupal Search vendor "Drupal"		Drupal Search vendor "Drupal" for product "Drupal"				>= 8.9.0 < 8.9.16 Search vendor "Drupal" for product "Drupal" and version " >= 8.9.0 < 8.9.16"		-		Affected
Drupal Search vendor "Drupal"		Drupal Search vendor "Drupal" for product "Drupal"				>= 9.0.0 < 9.0.14 Search vendor "Drupal" for product "Drupal" and version " >= 9.0.0 < 9.0.14"		-		Affected
Drupal Search vendor "Drupal"		Drupal Search vendor "Drupal" for product "Drupal"				>= 9.1.0 < 9.1.9 Search vendor "Drupal" for product "Drupal" and version " >= 9.1.0 < 9.1.9"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected