Описание
Cross-site scripting (XSS) in the CKEditor 5 real-time collaboration package
Impact
During a recent internal audit, we identified a Cross-Site Scripting (XSS) vulnerability in the CKEditor 5 real-time collaboration package. This vulnerability can lead to unauthorized JavaScript code execution and affects user markers, which represent users' positions within the document.
This vulnerability affects only installations with Real-time collaborative editing enabled.
Patches
The problem has been recognized and patched. The fix will be available in version 44.2.1 (and above).
For more information
Email us at security@cksource.com if you have any questions or comments about this advisory.
Ссылки
- https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-j3mm-wmfm-mwvh
- https://nvd.nist.gov/vuln/detail/CVE-2025-25299
- https://ckeditor.com/docs/ckeditor5/latest/features/collaboration/real-time-collaboration/real-time-collaboration.html
- https://ckeditor.com/docs/ckeditor5/latest/features/collaboration/real-time-collaboration/real-time-collaboration.html?docId=ee1dca024c9b4e44aef039f99ebe6c664
- https://github.com/ckeditor/ckeditor5/releases/tag/v44.2.1
Пакеты
@ckeditor/ckeditor5-real-time-collaboration
>= 41.3.0, <= 44.2.0
44.2.1
ckeditor5-premium-features
>= 42.0.0, < 44.2.0
44.2.1
Связанные уязвимости
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.
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.
CKEditor 5 is a modern JavaScript rich-text editor with an MVC archite ...