CVE-2026-19853 PUBLISHED

CyberTutor｜NewSiteServer (NSS) - Missing Authentication

Assigner: twcert
Reserved: 14.08.2026 Published: 24.08.2026 Updated: 24.08.2026

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.

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS Score: 5.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS Score: 6.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	CyberTutor
Product	NewSiteServer (NSS)
Versions	Default: unaffected Version all is affected

Solutions

Contact the vendor to take remedial measures.

References

Problem Types

CWE-306 Missing Authentication for Critical Function CWE

Impacts

CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs