---
id: CVE-2026-19853
title: >-
  NewSiteServer (NSS) developed by CyberTutor has a Missing Authentication
  vulnerability
summary: >-
  NewSiteServer (NSS) developed by CyberTutor has a Missing Authentication
  vulnerability. Unauthenticated remote attackers can exploit a specific
  functionality to send emails to anyone on behalf of the school.
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-306
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-2026-19853'
references:
  - url: 'https://www.twcert.org.tw/en/cp-139-11121-51e56-2.html'
    label: twcert@cert.org.tw
  - url: 'https://www.twcert.org.tw/tw/cp-132-11117-4f503-1.html'
    label: twcert@cert.org.tw
tags:
  - nvd
epss: 0.00335
epssPercentile: 0.24964
ingestedAt: '2026-10-12T16:57:59.903Z'
---

## Overview

NewSiteServer (NSS) developed by CyberTutor has a Missing Authentication vulnerability. Unauthenticated remote attackers can exploit a specific functionality to send emails to anyone on behalf of the school.

## Remediation

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