---
id: CVE-2026-19852
title: >-
  NewSiteServer (NSS) developed by CyberTutor has an Arbitrary File Upload
  vulnerability
summary: >-
  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.
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-434
published: '2026-08-24'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T16:10:00.220'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-19852'
references:
  - url: 'https://www.twcert.org.tw/en/cp-139-11120-64c52-2.html'
    label: twcert@cert.org.tw
  - url: 'https://www.twcert.org.tw/tw/cp-132-11116-2c1d8-1.html'
    label: twcert@cert.org.tw
tags:
  - nvd
epss: 0.00234
epssPercentile: 0.13211
ingestedAt: '2026-10-12T16:57:59.902Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.