What is CVE-2026-19853?

CVE-2026-19853 is a medium-severity vulnerability, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2026-08-24.

How severe is CVE-2026-19853?

Medium severity. CVSS v3 base score is 5.3 out of 10.

CVE-2026-19853

CVE-2026-19853

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.

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

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

Frequently asked questions

What is CVE-2026-19853?: CVE-2026-19853 is a medium-severity vulnerability, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2026-08-24.
How severe is CVE-2026-19853?: Medium severity. CVSS v3 base score is 5.3 out of 10.