{"id":"CVE-2023-4771","aliases":["GHSA-wh5w-82f3-wrxh"],"url":"https://o3.security/vulnerability/CVE-2023-4771","summary":"Cross-Site Scripting vulnerability in CKSource CKEditor","details":"### Affected packages\nThe vulnerability has been discovered in the AJAX sample available at the `samples/old/ajax.html` file location. All integrators that use that sample in the production code can be affected.\n\n### Impact\n\nA potential vulnerability has been discovered in one of CKEditor's 4 samples that are shipped with production code. The vulnerability allowed to execute JavaScript code by abusing the AJAX sample. It affects all users using the CKEditor 4 at version < 4.24.0-lts where `samples/old/ajax.html` is used in a production environment.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version 4.24.0-lts.\n\n### For more information\nEmail us at [security@cksource.com](mailto:security@cksource.com) if you have any questions or comments about this advisory.\n\n### Acknowledgements\nThe CKEditor 4 team would like to thank Rafael Pedrero and INCIBE ([original report](https://www.incibe.es/en/incibe-cert/notices/aviso/cross-site-scripting-vulnerability-cksource-ckeditor)) for recognizing and reporting this vulnerability.","published":"2023-11-16T14:08:47.418Z","modified":"2026-11-03T02:30:54.343278577Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"npm","name":"ckeditor4","fixedVersion":"4.24.0-lts"}],"fix":{"url":"https://github.com/ckeditor/ckeditor4/commit/8ed1a3c93d0ae5f49f4ecff5738ab8a2972194cb","label":"ckeditor/ckeditor4@8ed1a3c"},"references":[{"type":"WEB","url":"https://www.incibe.es/en/incibe-cert/notices/aviso/cross-site-scripting-vulnerability-cksource-ckeditor"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/4xxx/CVE-2023-4771.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-4771"},{"type":"WEB","url":"https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-wh5w-82f3-wrxh"},{"type":"WEB","url":"https://github.com/ckeditor/ckeditor4/commit/8ed1a3c93d0ae5f49f4ecff5738ab8a2972194cb"},{"type":"PACKAGE","url":"https://github.com/ckeditor/ckeditor4"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-11-03T02:30:54.343278577Z"}}