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CVE-2026-28343

MEDIUM CVSS 3.1: 6.1 EPSS 0.04%
Updated Mar 19, 2026
Ckeditor
Parameter Value
CVSS 6.1 (MEDIUM)
Affected Versions before 47.6.0
Fixed In 47.6.0
Type CWE-79 (Cross-Site Scripting (XSS))
Vendor Ckeditor
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v3.1

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Ckeditor Ckeditor5
cpe:2.3:a:ckeditor:ckeditor5:*:*:*:*:*:*:*:*
47.6.0

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