CVE-2021-33829

EUVD-2021-1398
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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 97%
Affected Products (NVD)
VendorProductVersion
ckeditorckeditor
4.14.0 ≤
𝑥
< 4.16.1
drupaldrupal
8.9.0 ≤
𝑥
< 8.9.16
drupaldrupal
9.0.0 ≤
𝑥
< 9.0.14
drupaldrupal
9.1.0 ≤
𝑥
< 9.1.9
debiandebian_linux
9.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
ckeditor
bookworm
4.19.1+dfsg-1
no-dsa
bullseye
4.16.0+dfsg-2
no-dsa
buster
no-dsa
sid
4.22.1+dfsg1-2
fixed
trixie
4.22.1+dfsg1-2
fixed
ckeditor3
bookworm
no-dsa
bullseye
no-dsa
buster
no-dsa
sid
vulnerable
trixie
vulnerable
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
ckeditor
bionic
Fixed 4.5.7+dfsg-2ubuntu0.18.04.1
released
focal
Fixed 4.12.1+dfsg-1ubuntu0.1
released
groovy
ignored
hirsute
ignored
impish
not-affected
jammy
not-affected
trusty
dne
xenial
Fixed 4.5.7+dfsg-2ubuntu0.16.04.1~esm1
released
Common Weakness Enumeration
References
https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser
https://lists.debian.org/debian-lts-announce/2021/11/msg00007.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WAGNWHFIQAVCP537KFFS2A2GDG66J7XD/
https://www.drupal.org/sa-core-2021-003
https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser
https://lists.debian.org/debian-lts-announce/2021/11/msg00007.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WAGNWHFIQAVCP537KFFS2A2GDG66J7XD/
https://www.drupal.org/sa-core-2021-003