CVE-2025-3845: Markparticle Webserver

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Markparticle Webserver: affected versions not specified

Published 2025-04-21. Last modified 2026-06-17.