CVE-2026-19853: CWE-306 Missing Authentication for Critical Function in CyberTutor NewSiteServer (NSS)
Description
CyberTutor's NewSiteServer (NSS) contains a missing authentication vulnerability that allows unauthenticated remote attackers to send emails on behalf of the school. This issue is classified under CWE-306 and has a medium severity rating with a CVSS score of 5.3. No affected versions or patches are specified in the available data.
CVSS v3.1
Score 5.3medium
Affected software
CyberTutor
NewSiteServer (NSS)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-19853 identifies a missing authentication vulnerability in CyberTutor's NewSiteServer (NSS). This flaw permits unauthenticated remote attackers to exploit a specific functionality to send emails impersonating the school. The vulnerability is categorized as CWE-306 (Missing Authentication for Critical Function). The CVSS v3.1 base score is 5.3, reflecting a medium severity with network attack vector, low attack complexity, no privileges required, no user interaction, and an impact limited to integrity loss without confidentiality or availability impact.
Potential Impact
The vulnerability allows unauthenticated attackers to send emails on behalf of the school, potentially enabling phishing or impersonation attacks. There is no direct impact on confidentiality or availability reported. The integrity of communications can be compromised due to unauthorized email sending.
Mitigation Recommendations
No patch or official remediation information is provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, organizations should monitor for suspicious email activity and consider compensating controls to restrict email sending capabilities if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- twcert
- Date Reserved
- 2026-08-14T09:35:37.124Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8bc014acd9273b49e07e69
Added to database: 08/24/2026, 03:52:52 UTC
Last enriched: 09/10/2026, 23:03:07 UTC
Last updated: 10/08/2026, 18:48:43 UTC
Views: 64
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