CVE-2026-19852 CyberTutor｜NewSiteServer (NSS) - Arbitrary File Upload
Unauthenticated attackers can upload arbitrary files, including malicious HTML, to NewSiteServer, enabling cross-site scripting and potential code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-19852?
CVE-2026-19852 is a medium-severity vulnerability in CyberTutor NewSiteServer (NSS), published on 24 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-434
Which versions are affected by CVE-2026-19852?
How do I fix CVE-2026-19852?
No fix has been published for CVE-2026-19852 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-19852 being exploited?
There is no known exploitation of CVE-2026-19852 in the wild and no public exploit code.
Sources
Also known as GHSA-q3pc-8mvq-c8v3.