2.3

CVE-2025-25299: ckeditor ckeditor5 Cross-site Scripting

CVSS: 2.3v4.0LowDeferred
AliasesUBUNTU-CVE-2025-25299GHSA-j3mm-wmfm-mwvh
Published 20-02-2025Last modified 20-02-2025
Open JSON

Vulnerability summary

CVE-2025-25299 is a low (CVSS 2.3) Cross-site Scripting vulnerability in ckeditor ckeditor5. EPSS estimates a 0.60% chance of exploitation in the next 30 days, higher than 47.8% of scored vulnerabilities.

Overall risk
9/100
0100
Minimal · default modelHow is this calculated?
CVSS score
2.3/10
010
Low · v4.0 (CVE.org)
EPSS score
0.60%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 20-02-2025
    PublishedVulnerability first disclosed.
  2. 20-02-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.60%

Chance of exploitation in the next 30 days

Percentile

48%

Versus all other CVEs

30-day change

0.00 pp

From 0.60% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.60%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu4 products
  • ckeditorAll versions (No fix recorded)
  • ckeditor3All versions (No fix recorded)
  • ldap-account-managerAll versions (No fix recorded)
  • request-tracker4All versions (No fix recorded)
@ckeditor1 product
  • ckeditor5-real-time-collaboration≥ 41.3.0, < 44.2.1
Ckeditor1 product
  • ckeditor5@ckeditor/ckeditor5-real-time-collaboration: >= 41.3.0, < 44.2.1 | ckeditor5-premium-features: >= 42.0.0, < 44.2.1
Npm1 product
  • ckeditor5-premium-features≥ 42.0.0, < 44.2.1

4 vendors · 7 products

References

8 links