Public exploit available
Public proof-of-concept or exploit code exists (ExploitDB / Metasploit / Nuclei).

CVE-2021-33829 — Cross-site Scripting in Ckeditor

CWE-79 — Cross-site Scripting12 documents8 sources
Severity
6.1MEDIUMNVD
EPSS
49.7%
top 2.19%
CISA KEV
Not in KEV
Exploit
PoC available
Public exploit / PoC exists
Affected products
6
CkeditorDrupalDrupal Core+3 more
Timeline
PublishedJun 9
Latest updateMar 23

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitability: 2.8 | Impact: 2.7

Affected Packages7 packages

▶NVDckeditor/ckeditor4.14.0 — 4.16.1
▶npmckeditor/ckeditor44.14.0 — 4.16.1
▶Debianckeditor/ckeditor< 4.16.0+dfsg-2+1
▶Ubuntuckeditor/ckeditor< 4.5.7+dfsg-2ubuntu0.16.04.1~esm1
▶Packagistdrupal/core7.0.0 — 7.80+3

Also affects: Debian Linux 9.0, Fedora 33, 34, 35

Patches

Patch: ckeditor.com ↗Patch: www.drupal.org ↗Patch: ckeditor.com ↗

🔴Vulnerability Details

6
OSV
ckeditor vulnerabilities↗2022-03-23
▶
GHSA
ckeditor4 vulnerable to cross-site scripting↗2021-06-21
▶
OSV
ckeditor4 vulnerable to cross-site scripting↗2021-06-21
▶
CVEList
CVE-2021-33829: A cross-site scripting (XSS) vulnerability in the HTML Data Processor in CKEditor 4 4↗2021-06-09
▶
OSV
CVE-2021-33829: A cross-site scripting (XSS) vulnerability in the HTML Data Processor in CKEditor 4 4↗2021-06-09
▶

💥Exploits & PoCs

1
Nuclei
Drupal 7 CKEditor XSS
▶

📋Vendor Advisories

4
Ubuntu
CKEditor vulnerabilities↗2022-03-23
▶
Ubuntu
CKEditor vulnerabilities↗2022-03-22
▶
Drupal
Drupal core - Moderately critical - Cross Site Scripting - SA-CORE-2021-003↗2021-05-26
▶
Debian
CVE-2021-33829: ckeditor - A cross-site scripting (XSS) vulnerability in the HTML Data Processor in CKEdito...↗2021
▶