CVEvulnerability
CVE-2021-33829
6.1 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2021-06-09
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.1 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:P/A:N
- Weaknesses
- CWE-79
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.
Affected configurations
• ckeditor ckeditor (>= 4.14.0 < 4.16.1)
• fedoraproject fedora 33
• fedoraproject fedora 34
• fedoraproject fedora 35
• drupal drupal (>= 8.9.0 < 8.9.16)
• drupal drupal (>= 9.0.0 < 9.0.14)
• drupal drupal (>= 9.1.0 < 9.1.9)
• debian debian linux 9.0
Related
Weakness · CWE (1)
- CWE-79 Improper Neutralization of Input During Web Page Generation weakness
References
- https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser Patch, Release Notes, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/11/msg00007.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WAGNWHFIQAVCP537KFFS2A2GDG66J7XD/ lists.fedoraproject.org
- https://www.drupal.org/sa-core-2021-003 Patch, 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.debian.org/debian-lts-announce/2021/11/msg00007.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WAGNWHFIQAVCP537KFFS2A2GDG66J7XD/ lists.fedoraproject.org
- https://www.drupal.org/sa-core-2021-003 Patch, Third Party Advisory