CVE-2021-33829
Published: 9 June 2021
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.
Priority
Status
Package | Release | Status |
---|---|---|
ckeditor
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.5.7+dfsg-2ubuntu0.18.04.1)
|
focal |
Released
(4.12.1+dfsg-1ubuntu0.1)
|
|
groovy |
Ignored
(end of life, was needed)
|
|
hirsute |
Ignored
(end of life)
|
|
impish |
Not vulnerable
(4.16.0+dfsg-2)
|
|
jammy |
Not vulnerable
(4.16.0+dfsg-2)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.16.0+dfsg-2)
|
|
xenial |
Released
(4.5.7+dfsg-2ubuntu0.16.04.1~esm1)
Available with Ubuntu Pro |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.1 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | Required |
Scope | Changed |
Confidentiality | Low |
Integrity impact | Low |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
References
- https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser
- https://github.com/ckeditor/ckeditor4/commit/3e426ce34f7fc7bf784624358831ef9e189bb6ed
- https://ubuntu.com/security/notices/USN-5340-1
- https://www.cve.org/CVERecord?id=CVE-2021-33829
- NVD
- Launchpad
- Debian