npm/ckeditor4 CVE-2021-33829: medium 6.1, EPSS 3.19%

ckeditor4 vulnerable to cross-site scripting

Action: Upgrade ckeditor4 to 4.16.1 or later.

npm i ckeditor4@4.16.1

Affected

Fixed versions

Sources

• osv: GHSA-rgx6-rjj4-c388
• https://nvd.nist.gov/vuln/detail/CVE-2021-33829
• https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser
• https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2021-33829.yaml
• https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2021-33829.yaml
• https://github.com/ckeditor/ckeditor4
• https://lists.debian.org/debian-lts-announce/2021/11/msg00007.html
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WAGNWHFIQAVCP537KFFS2A2GDG66J7XD
• https://www.drupal.org/sa-core-2021-003
• https://www.npmjs.com/package/ckeditor4

CVE-2021-33829 · published 2021-06-21T17:16:42Z · modified 2025-12-10T23:41:06.105880Z · JSON