{"id":"UBUNTU-CVE-2021-32809","details":"ckeditor is an open source WYSIWYG HTML editor with rich content support. A potential vulnerability has been discovered in CKEditor 4 [Clipboard](https://ckeditor.com/cke4/addon/clipboard) package. The vulnerability allowed to abuse paste functionality using malformed HTML, which could result in injecting arbitrary HTML into the editor. It affects all users using the CKEditor 4 plugins listed above at version \u003e= 4.5.2. The problem has been recognized and patched. The fix will be available in version 4.16.2.","modified":"2026-02-04T02:44:29.337673Z","published":"2021-08-12T17:15:00Z","related":["USN-5340-1","USN-5340-2"],"upstream":["CVE-2021-32809"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-32809"},{"type":"REPORT","url":"https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-7889-rm5j-hpgg"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5340-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-32809"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5340-2"}],"affected":[{"package":{"name":"ckeditor","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/ckeditor@4.5.7+dfsg-2ubuntu0.16.04.1~esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.7+dfsg-2ubuntu0.16.04.1~esm1"}]}],"versions":["4.4.4+dfsg1-3","4.5.6+dfsg-1","4.5.7+dfsg-1","4.5.7+dfsg-2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"ckeditor","binary_version":"4.5.7+dfsg-2ubuntu0.16.04.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32809.json"}},{"package":{"name":"ckeditor","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ckeditor@4.5.7+dfsg-2ubuntu0.18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.7+dfsg-2ubuntu0.18.04.1"}]}],"versions":["4.5.7+dfsg-2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"ckeditor","binary_version":"4.5.7+dfsg-2ubuntu0.18.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32809.json"}},{"package":{"name":"ckeditor","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ckeditor@4.12.1+dfsg-1ubuntu0.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.1+dfsg-1ubuntu0.1"}]}],"versions":["4.11.1+dfsg-1","4.12.1+dfsg-1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"ckeditor","binary_version":"4.12.1+dfsg-1ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32809.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}