What is CVE-2026-19852?

CVE-2026-19852 is a medium-severity vulnerability in Cybertutor Newsiteserver (Nss), classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 6.1/10. Published 2026-08-24.

How severe is CVE-2026-19852?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Arbitrary file upload in Cybertutor Newsiteserver (Nss)

CVE-2026-19852

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.

Vulnerability class: Unrestricted File Upload

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Cybertutor Newsiteserver (Nss)

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

twcert@cert.org.tw (third-party-advisory)
twcert@cert.org.tw (third-party-advisory)

Frequently asked questions

What is CVE-2026-19852?: CVE-2026-19852 is a medium-severity vulnerability in Cybertutor Newsiteserver (Nss), classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 6.1/10. Published 2026-08-24.
How severe is CVE-2026-19852?: Medium severity. CVSS v3 base score is 6.1 out of 10.