Vulnerability Details : CVE-2021-33829
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.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2021-33829
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
- cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
- cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
- cpe:2.3:a:ckeditor:ckeditor:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-33829
0.54%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 77 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-33829
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST | |
6.1
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
2.8
|
2.7
|
NIST |
CWE ids for CVE-2021-33829
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-33829
-
https://lists.debian.org/debian-lts-announce/2021/11/msg00007.html
[SECURITY] [DLA 2813-1] ckeditor security updateMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW/
[SECURITY] Fedora 34 Update: ckeditor-4.16.2-1.fc34 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WAGNWHFIQAVCP537KFFS2A2GDG66J7XD/
[SECURITY] Fedora 33 Update: ckeditor-4.16.2-1.fc33 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser
Patch;Release Notes;Vendor Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T/
[SECURITY] Fedora 35 Update: ckeditor-4.16.2-1.fc35 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://www.drupal.org/sa-core-2021-003
Drupal core - Moderately critical - Cross Site Scripting - SA-CORE-2021-003 | Drupal.orgPatch;Third Party Advisory
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