{"id":"CVE-2021-33829","details":"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 --!\u003e is mishandled.","aliases":["BIT-drupal-2021-33829","DRUPAL-CORE-2021-003","GHSA-rgx6-rjj4-c388"],"modified":"2026-07-07T08:50:14.750110141Z","published":"2021-06-09T12:15:07.863Z","database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"9.0"},{"last_affected":"9.0"}],"source":"CPE_STRING","vendor_product":"debian:debian_linux"},{"extracted_events":[{"introduced":"33"},{"last_affected":"33"},{"introduced":"34"},{"last_affected":"34"},{"introduced":"35"},{"last_affected":"35"}],"source":"CPE_STRING","vendor_product":"fedoraproject:fedora","cpes":["cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*"]}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WAGNWHFIQAVCP537KFFS2A2GDG66J7XD/"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/11/msg00007.html"},{"type":"FIX","url":"https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser"},{"type":"FIX","url":"https://www.drupal.org/sa-core-2021-003"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ckeditor/ckeditor4","events":[{"introduced":"8a12b041718e05eeffb62a931d95995ac72cbe22"},{"fixed":"cae20318d46745cc46c811da4e7d68b38ca32449"}],"database_specific":{"extracted_events":[{"introduced":"4.14.0"},{"fixed":"4.16.1"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:ckeditor:ckeditor:*:*:*:*:*:*:*:*"}}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-33829.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/ckeditor/ckeditor4-releases","events":[{"introduced":"0d574568baeddda92f231681ea5aac4860dca4e4"},{"fixed":"a0d9ddd4b80b3dcc1d1bc8c2acc2d43e4c96b660"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:ckeditor:ckeditor:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"4.14.0"},{"fixed":"4.16.1"}]}}],"versions":["standard/4.16.0","standard/4.15.1","standard/4.15.0","standard/4.14.1","standard/4.14.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-33829.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/drupal/drupal","events":[{"introduced":"a412ca41cfc0d954fe3cb2dd982dc6ca049b1c70"},{"fixed":"1667e06929722a8d913ef989cc00f70a38129d6d"},{"introduced":"d62812dc17ce593beb2ccd4cdbee1a76c95e3fd7"},{"fixed":"ac80ed0600b9437c5959d3293cdbc67be0b7d320"},{"introduced":"5c6f14f762c9aef87cd2731818386f202ee8463c"},{"fixed":"c1b981a183d874efbc3cd211373067b574c8f1cb"}],"database_specific":{"cpe":"cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"8.9.0"},{"fixed":"8.9.16"},{"introduced":"9.0.0"},{"fixed":"9.0.14"},{"introduced":"9.1.0"},{"fixed":"9.1.9"}],"source":"CPE_RANGE"}}],"versions":["9.1.8","9.0.13","8.9.15","9.1.6","9.1.5","9.1.4","8.9.12","9.0.10","9.1.2","9.1.1","8.9.11","9.1.0","8.9.8","8.9.5","9.0.5","8.9.4","8.9.3","9.0.3","8.9.2","9.0.2","8.9.0","9.0.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-33829.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}