CVE-2026-19853 CyberTutor｜NewSiteServer (NSS) - Missing Authentication
Unauthenticated attackers can send emails on behalf of the school, requiring administrators to restrict access to the email functionality.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19853?
CVE-2026-19853 is a medium-severity missing authorization vulnerability in CyberTutor NewSiteServer (NSS), published on 24 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-306
Which versions are affected by CVE-2026-19853?
How do I fix CVE-2026-19853?
No fix has been published for CVE-2026-19853 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-19853 being exploited?
There is no known exploitation of CVE-2026-19853 in the wild and no public exploit code.
Sources
Also known as GHSA-wg72-7cgc-92mc.