CVE-2026-19852— CyberTutor｜NewSiteServer (NSS) - Arbitrary File Upload
Quick assessment
Affected
CyberTutor NewSiteServer (NSS)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
CyberTutor 开发的 NewSiteServer（NSS）存在任意文件上传漏洞。未经验证的远程攻击者可以上传任意文件，包括恶意 HTML 文件，从而实现类似跨站脚本（XSS）的效果。
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I. Basic Information for CVE-2026-19852
Vulnerability Information
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Vulnerability Title
CyberTutor｜NewSiteServer (NSS) - Arbitrary File Upload
Source: CVE Program / CVE List V5
Vulnerability Description
NewSiteServer (NSS) developed by CyberTutor has an Arbitrary File Upload vulnerability. Unauthenticated remote attackers can upload arbitrary files, including malicious HTML files, thereby achieving effects similar to cross-site scripting.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| CyberTutor | NewSiteServer (NSS) | all | - |
|
II. Public POCs for CVE-2026-19852
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-19852 (2)
IV. Related Vulnerabilities
Same weakness: CWE-434
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V. Comments for CVE-2026-19852
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