ckeditor/ckeditor5 · Security
Cross-site scripting (XSS) in the CKEditor 5 real-time collaboration package
- GHSA ID
- GHSA-j3mm-wmfm-mwvh
- CVE ID
- CVE-2025-25299
- Severity
- medium
- Published
- Updated
- CVSS v4
- 6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Description
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 [email protected] if you have any questions or comments about this advisory.
CWEs
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CWE-80 · Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
References
- https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-j3mm-wmfm-mwvh ↗
- https://ckeditor.com/docs/ckeditor5/latest/features/collaboration/real-time-collaboration/real-time-collaboration.html?docId=ee1dca024c9b4e44aef039f99ebe6c664 ↗
- 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://github.com/ckeditor/ckeditor5/releases/tag/v44.2.1 ↗
- https://github.com/advisories/GHSA-j3mm-wmfm-mwvh ↗