CKEditor cross-site scripting vulnerability in AJAX sample
Affected packages
The 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.
Impact
A 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.
Patches
The problem has been recognized and patched. The fix will be available in version 4.24.0-lts.
For more information
Email us at security@cksource.com if you have any questions or comments about this advisory.
Acknowledgements
The CKEditor 4 team would like to thank Rafael Pedrero and INCIBE (original report) for recognizing and reporting this vulnerability.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | ckeditor4 | < 4.24.0-lts | 4.24.0-lts |
References
- https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-wh5w-82f3-wrxh
- https://nvd.nist.gov/vuln/detail/CVE-2023-4771
- https://github.com/ckeditor/ckeditor4/commit/8ed1a3c93d0ae5f49f4ecff5738ab8a2972194cb
- https://github.com/ckeditor/ckeditor4
- https://www.incibe.es/en/incibe-cert/notices/aviso/cross-site-scripting-vulnerability-cksource-ckeditor
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- npm
- Package
ckeditor4- Disclosed
- 07.02.2024
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-wh5w-82f3-wrxh - CC BY 4.0
Vulnerability history: ckeditor4
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 15
- First → latest
- 05.2021 08.2024
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 4
- Medium 11
Disclosures per year
- 2021: 8
- 2022: 2
- 2023: 0
- 2024: 5
- 2025: 0
- 2026: 0
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