{"api_version":"1","generated_at":"2026-04-22T21:38:52+00:00","cve":"CVE-2021-33829","urls":{"html":"https://cve.report/CVE-2021-33829","api":"https://cve.report/api/cve/CVE-2021-33829.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-33829","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-33829"},"summary":{"title":"CVE-2021-33829","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.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2021-06-09 12:15:00","updated_at":"2023-11-07 03:35:00"},"problem_types":["CWE-79"],"metrics":[],"references":[{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T/","name":"FEDORA-2021-51457da891","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 35 Update: ckeditor-4.16.2-1.fc35 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.debian.org/debian-lts-announce/2021/11/msg00007.html","name":"[debian-lts-announce] 20211109 [SECURITY] [DLA 2813-1] ckeditor security update","refsource":"MLIST","tags":[],"title":"[SECURITY] [DLA 2813-1] ckeditor security update","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser","name":"https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser","refsource":"MISC","tags":[],"title":"CKEditor 4.16.1 with accessibility enhancements","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WAGNWHFIQAVCP537KFFS2A2GDG66J7XD/","name":"FEDORA-2021-87578dca12","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 33 Update: ckeditor-4.16.2-1.fc33 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WAGNWHFIQAVCP537KFFS2A2GDG66J7XD/","name":"FEDORA-2021-87578dca12","refsource":"","tags":[],"title":"[SECURITY] Fedora 33 Update: ckeditor-4.16.2-1.fc33 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW/","name":"FEDORA-2021-72176a63a8","refsource":"","tags":[],"title":"[SECURITY] Fedora 34 Update: ckeditor-4.16.2-1.fc34 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW/","name":"FEDORA-2021-72176a63a8","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 34 Update: ckeditor-4.16.2-1.fc34 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T/","name":"FEDORA-2021-51457da891","refsource":"","tags":[],"title":"[SECURITY] Fedora 35 Update: ckeditor-4.16.2-1.fc35 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.drupal.org/sa-core-2021-003","name":"https://www.drupal.org/sa-core-2021-003","refsource":"CONFIRM","tags":[],"title":"Access to this page has been denied.","mime":"text/html","httpstatus":"403","archivestatus":"403"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-33829","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33829","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"33829","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"ckeditor","cpe5":"ckeditor","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"33829","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"9.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"33829","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"drupal","cpe5":"drupal","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"33829","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"33","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"33829","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"34","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"33829","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"35","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2021-33829","qid":"178885","title":"Debian Security Update for ckeditor (DLA 2813-1)"},{"cve":"CVE-2021-33829","qid":"180331","title":"Debian Security Update for ckeditor (CVE-2021-33829)"},{"cve":"CVE-2021-33829","qid":"198710","title":"Ubuntu Security Notification for CKEditor Vulnerabilities (USN-5340-1)"},{"cve":"CVE-2021-33829","qid":"281934","title":"Fedora Security Update for ckeditor (FEDORA-2021-87578dca12)"},{"cve":"CVE-2021-33829","qid":"281935","title":"Fedora Security Update for ckeditor (FEDORA-2021-72176a63a8)"},{"cve":"CVE-2021-33829","qid":"980090","title":"Nodejs (npm) Security Update for ckeditor4 (GHSA-rgx6-rjj4-c388)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2021-33829","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"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."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"refsource":"CONFIRM","name":"https://www.drupal.org/sa-core-2021-003","url":"https://www.drupal.org/sa-core-2021-003"},{"refsource":"MISC","name":"https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser","url":"https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser"},{"refsource":"FEDORA","name":"FEDORA-2021-51457da891","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T/"},{"refsource":"FEDORA","name":"FEDORA-2021-72176a63a8","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW/"},{"refsource":"FEDORA","name":"FEDORA-2021-87578dca12","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WAGNWHFIQAVCP537KFFS2A2GDG66J7XD/"},{"refsource":"MLIST","name":"[debian-lts-announce] 20211109 [SECURITY] [DLA 2813-1] ckeditor security update","url":"https://lists.debian.org/debian-lts-announce/2021/11/msg00007.html"}]}},"nvd":{"publishedDate":"2021-06-09 12:15:00","lastModifiedDate":"2023-11-07 03:35:00","problem_types":["CWE-79"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM"},"exploitabilityScore":2.8,"impactScore":2.7},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:N/I:P/A:N","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"NONE","baseScore":4.3},"severity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:ckeditor:ckeditor:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.0","versionEndExcluding":"4.16.1","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*","versionStartIncluding":"9.1.0","versionEndExcluding":"9.1.9","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*","versionStartIncluding":"9.0.0","versionEndExcluding":"9.0.14","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*","versionStartIncluding":"8.9.0","versionEndExcluding":"8.9.16","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"33829","Ordinal":"209269","Title":"CVE-2021-33829","CVE":"CVE-2021-33829","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"33829","Ordinal":"1","NoteData":"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.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"33829","Ordinal":"2","NoteData":"2021-06-09","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"33829","Ordinal":"3","NoteData":"2021-11-09","Type":"Other","Title":"Modified"}]}}}