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CVE-2026-44259— efw4.X: Stored XSS via previewServlet

CVSS 4.6 · Medium EPSS 0.03% · P8
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I. Basic Information for CVE-2026-44259

Vulnerability Information
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Vulnerability Title
efw4.X: Stored XSS via previewServlet
Source: NVD (National Vulnerability Database)
Vulnerability Description
efw4.X is an Enterprise Framework for Web. Prior to 4.08.010, the previewServlet serves files with their detected MIME type based on file extension, without any content sanitization or security headers. Files with .html, .htm, or .svg extensions are served as text/html or image/svg+xml respectively, causing any embedded JavaScript to execute in the victim's browser within the application's origin. This vulnerability is fixed in 4.08.010.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
Web页面中脚本相关HTML标签转义处理不恰当(基本跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
EFW Framework 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
EFW Framework是efw group开源的一个基于Ajax和服务端JavaScript的企业级Web开发框架。 EFW Framework 4.08.010之前版本存在安全漏洞，该漏洞源于previewServlet未进行内容清理或安全标头，可能导致跨站脚本攻击。
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

VendorProductAffected VersionsCPESubscribe
efwGrpefw4.X < 4.08.010 -

II. Public POCs for CVE-2026-44259

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III. Intelligence Information for CVE-2026-44259

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Same Patch Batch · efwGrp · 2026-05-12 · 4 CVEs total

CVE-2026-442608.1 HIGHefw4.X: readonly Flag Not Enforced Server-Side
CVE-2026-44257efw4.X: RCE via zipslip
CVE-2026-44258efw4.X: Path Traversal via Unchecked dst Parameter leads to Remote Code Execution

IV. Related Vulnerabilities

Same product: efw4.X
Same vendor: efwGrp
Same weakness: CWE-80

V. Comments for CVE-2026-44259

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