Vulnerability Description
CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. During a recent internal audit, a Cross-Site Scripting (XSS) vulnerability was discovered in the CKEditor 5 real-time collaboration package. This vulnerability affects user markers, which represent users' positions within the document. It can lead to unauthorized JavaScript code execution, which might happen with a very specific editor and token endpoint configuration. This vulnerability affects only installations with Real-time collaborative editing enabled. The problem has been recognized and patched. The fix is available in version 44.2.1 (and above). Users are advised to upgrade. There are no known workarounds for this vulnerability.
Related Weaknesses (CWE)
References
- https://ckeditor.com/docs/ckeditor5/latest/features/collaboration/real-time-coll
- https://github.com/ckeditor/ckeditor5/releases/tag/v44.2.1
- https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-j3mm-wmfm-mwvh
FAQ
What is CVE-2025-25299?
CVE-2025-25299 is a documented vulnerability. CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. During a recent internal audit, a Cross-Site Scripting (XSS) vulnerability was discovered in the CKEditor 5 real-time colla...
How severe is CVE-2025-25299?
CVSS scoring is not yet available for CVE-2025-25299. Check NVD for updates.
Is there a patch for CVE-2025-25299?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.