CVE-2026-19853: CyberTutor｜NewSiteServer (NSS) - Missing Authentication

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-24 · updated 2026-10-12
Weakness: CWE-306

Description

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.

Affected products

CyberTutor NewSiteServer (NSS): all versions

References

https://www.twcert.org.tw/en/cp-139-11121-51e56-2.html
https://www.twcert.org.tw/tw/cp-132-11117-4f503-1.html

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