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Cross-site scripting (XSS) in the real-time collaboration package

High
Mgsy published GHSA-j3mm-wmfm-mwvh Feb 20, 2025

Package

npm @ckeditor/ckeditor5-real-time-collaboration (npm)

Affected versions

v41.3.0 - v44.2.0

Patched versions

v44.2.1
npm ckeditor5-premium-features (npm)
v42.0.0 - v44.2.0
v44.2.1

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.

Severity

High

CVE ID

CVE-2025-25299

Weaknesses