CVE-2026-19852 PUBLISHED

CyberTutor｜NewSiteServer (NSS) - Arbitrary File Upload

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

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.

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS Score: 6.1

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

CVSS 3.1

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS Score: 5.1

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

CVSS 4.0

Product Status

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

CVE-2026-19852 PUBLISHED

CyberTutor｜NewSiteServer (NSS) - Arbitrary File Upload

Metrics

Product Status

Solutions

References

Problem Types