Vulnerability · Published Feb 20, 2025 · Assigned by GitHub_M
CVE-2025-25299Cross-site scripting (XSS) in the real-time collaboration package
Low 2.3
In plain English
A low-severity cross-site scripting in ckeditor5 from ckeditor. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:25.10 | ckeditor | no fix listed | UBUNTU-CVE-2025-25299 |
| Ubuntu:22.04:LTS | ckeditor3 | no fix listed | UBUNTU-CVE-2025-25299 |
| Ubuntu:24.04:LTS | ckeditor3 | no fix listed | UBUNTU-CVE-2025-25299 |
| Ubuntu:22.04:LTS | ldap-account-manager | no fix listed | UBUNTU-CVE-2025-25299 |
| Ubuntu:24.04:LTS | ldap-account-manager | no fix listed | UBUNTU-CVE-2025-25299 |
| Ubuntu:25.10 | ldap-account-manager | no fix listed | UBUNTU-CVE-2025-25299 |
| Ubuntu:26.04:LTS | ldap-account-manager | no fix listed | UBUNTU-CVE-2025-25299 |
| Ubuntu:22.04:LTS | request-tracker4 | no fix listed | UBUNTU-CVE-2025-25299 |
| Ubuntu:24.04:LTS | request-tracker4 | no fix listed | UBUNTU-CVE-2025-25299 |
| Ubuntu:25.10 | request-tracker4 | no fix listed | UBUNTU-CVE-2025-25299 |
| Ubuntu:26.04:LTS | request-tracker4 | no fix listed | UBUNTU-CVE-2025-25299 |
| npm | @ckeditor/ckeditor5-real-time-collaboration | 44.2.1 | GHSA-j3mm-wmfm-mwvh |
| npm | ckeditor5-premium-features | 44.2.1 | GHSA-j3mm-wmfm-mwvh |
Affected products (as reported)
Weakness: CWE-79, CWE-80 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-j3mm-wmfm-mwvh x_refsource_CONFIRM
- https://ckeditor.com/docs/ckeditor5/latest/features/collaboration/real-time-collaboration/real-time-collaboration.html x_refsource_MISC
- https://github.com/ckeditor/ckeditor5/releases/tag/v44.2.1 x_refsource_MISC