CVE-2025-3845 markparticle WebServer buffer.cpp HasWritten buffer overflow
Remote attackers can trigger a buffer overflow in markparticle WebServer via the HasWritten function, potentially leading to code execution or service disruption.
- 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-2025-3845?
CVE-2025-3845 is a medium-severity memory corruption vulnerability in markparticle WebServer, published on 21 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was found in markparticle WebServer up to 1.0. It has been declared as critical. Affected by this vulnerability is the function Buffer::HasWritten of the file code/buffer/buffer.cpp. The manipulation of the argument writePos_ leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2025-3845?
It affects 1 product.
Products include Markparticle Webserver.
How do I fix CVE-2025-3845?
No fix has been published for CVE-2025-3845 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-3845 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-3845 exists.
Other vulnerabilities in markparticle WebServer
Sources
Also known as GHSA-8q95-7vjm-3mfq.