CVE-2025-25299— Cross-site scripting (XSS) in the real-time collaboration package
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I. Basic Information for CVE-2025-25299
Vulnerability Information
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Vulnerability Title
Cross-site scripting (XSS) in the real-time collaboration package
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
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 安全漏洞
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版本存在安全漏洞，该漏洞源于实时协作包中发现了一个跨站脚本 (XSS) 漏洞，可能导致未经授权的JavaScript代码执行。
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-2025-25299
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- Release v44.2.1 · ckeditor/ckeditor5 · GitHubx_refsource_MISC
- Real-time collaboration overview | CKEditor 5 Documentationx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2025-25299
IV. Related Vulnerabilities
Same product: ckeditor5
- CVE-2026-28343
CKEditor: Cross-site scripting (XSS) in the HTML Support pac - CVE-2025-58064
CKEditor is susceptible to Cross-Site Scripting (XSS) throug - 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-2026-28343
CKEditor: Cross-site scripting (XSS) in the HTML Support pac - CVE-2025-58064
CKEditor is susceptible to Cross-Site Scripting (XSS) throug - 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-2025-25299
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