CVE-2026-28343— CKEditor: Cross-site scripting (XSS) in the HTML Support package
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I. Basic Information for CVE-2026-28343
Vulnerability Information
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Vulnerability Title
CKEditor: Cross-site scripting (XSS) in the HTML Support package
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
CKEditor 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CKEditor是CKEditor开源的一个企业级 WYSIWYG 编辑器。 CKEditor 5 47.6.0之前版本存在跨站脚本漏洞，该漏洞源于General HTML Support功能存在跨站脚本，可能导致执行未经授权的JavaScript代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-28343
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- Release v47.6.0 · ckeditor/ckeditor5 · GitHubx_refsource_MISC
- Release v29.0.0 · ckeditor/ckeditor5 · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-28343
IV. Related Vulnerabilities
Same product: ckeditor5
- CVE-2025-58064
CKEditor is susceptible to Cross-Site Scripting (XSS) throug - CVE-2025-25299
Cross-site scripting (XSS) in the real-time collaboration pa - CVE-2024-45613
CKEditor 5 has Cross-site Scripting vulnerability in the cli - CVE-2022-31175
Cross-site scripting caused by the editor instance destroyin - CVE-2021-21391
Regular expression Denial of Service in multiple packages
Same vendor: ckeditor
- CVE-2025-58064
CKEditor is susceptible to Cross-Site Scripting (XSS) throug - CVE-2025-25299
Cross-site scripting (XSS) in the real-time collaboration pa - CVE-2024-45613
CKEditor 5 has Cross-site Scripting vulnerability in the cli - CVE-2024-43411
CKEditor4 has a low risk cross-site scripting (XSS) vulnerab - CVE-2024-43407
Code Snippet GeSHi plugin has reflected cross-site scripting
Same weakness: CWE-79
- CVE-2026-8262
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V. Comments for CVE-2026-28343
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