CVE-2026-28343

medium

Description

CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. 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.

References

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

https://github.com/ckeditor/ckeditor5/releases/tag/v47.6.0

Details

Source: Mitre, NVD

Published: 2026-03-05

Updated: 2026-03-09

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.4

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

Severity: Medium

EPSS

EPSS: 0.00043