EUVD-2026-64705
GHSA-wg72-7cgc-92mc
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-accessible with no authentication or complexity required; impact is solely low integrity via email spoofing, with no confidentiality or availability consequence.
Primary rating from Vendor (twcert).
CVSS VectorVendor: twcert
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Missing authentication in NewSiteServer (NSS) by CyberTutor exposes an email-dispatch function to unauthenticated remote attackers, allowing them to send arbitrary emails to any recipient while impersonating the school. All versions of the product are affected per EUVD-2026-64705, and the CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N) confirms exploitation requires no privileges and no user interaction from any network position. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No authentication is required and no special configuration must be in place - the CVSS 4.0 vector (PR:N/AC:L/AT:N/UI:N) confirms this is a default-state vulnerability exploitable by any network-reachable client. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 6.9 reflects a medium-severity finding with AV:N/AC:L/AT:N/PR:N/UI:N, placing it in the category of trivially exploitable network flaws. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch version has been independently confirmed at the time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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