CVE-2026-28343

MEDIUM

6.4

Description

CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. Starting in version 29.0.0 and prior to version 47.6.0, a cross-site scripting (XSS) vulnerability has been discovered in the General HTML Support feature. This vulnerability could be triggered by inserting specially crafted markup, leading to unauthorized JavaScript code execution, if the editor instance used an unsafe General HTML Support configuration. This issue has been patched in version 47.6.0.

CVE Details

CVSS v3.1 Score6.4

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published3/5/2026

Last Modified3/19/2026

Sourcenvd

Honeypot Sightings0

Affected Products

ckeditor:ckeditor5

Weaknesses (CWE)

CWE-79

References

https://github.com/ckeditor/ckeditor5/releases/tag/v29.0.0(security-advisories@github.com)

https://github.com/ckeditor/ckeditor5/releases/tag/v47.6.0(security-advisories@github.com)

https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-jrqm-vmqc-gm93(security-advisories@github.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.