CVE-2026-19852: CyberTutor｜NewSiteServer (NSS) - Arbitrary File Upload

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% 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-434

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.

Affected products

CyberTutor NewSiteServer (NSS): all versions

References

https://www.twcert.org.tw/en/cp-139-11120-64c52-2.html
https://www.twcert.org.tw/tw/cp-132-11116-2c1d8-1.html

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