{"action":"Upgrade drupal/drupal to 7.80 or later.","affected":[{"fixed":"7.80","introduced":"7.0.0"},{"fixed":"8.9.16","introduced":"8.0.0"},{"fixed":"9.0.14","introduced":"9.0.0"},{"fixed":"9.1.9","introduced":"9.1.0"}],"component":"drupal/drupal","cve_ids":["CVE-2021-33829"],"ecosystem":"Packagist","epss":0.03189,"exploited":false,"fixed_versions":["7.80","8.9.16","9.0.14","9.1.9"],"ghsa_id":"GHSA-rgx6-rjj4-c388","id":"tcs_01M5KF8925G7Q0BBSJZMY8C6QF","modified_at":"2025-12-10T23:41:06.105880Z","published_at":"2021-06-21T17:16:42Z","references":["https://osv.dev/vulnerability/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"],"severity":{"label":"medium","score":6.1},"sources":[{"source":"osv","source_id":"GHSA-rgx6-rjj4-c388#Packagist/drupal/drupal","url":"https://osv.dev/vulnerability/GHSA-rgx6-rjj4-c388"}],"summary":"ckeditor4 vulnerable to cross-site scripting"}