CVE-2025-3845

Name: CVE-2025-3845
Creator: NVD / NIST
Published: 2025-04-21T22:15:15.603+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.9/10EPSS 0.57%

Last modified Jun 17, 2026

CVE-2025-3845 is a medium-severity vulnerability rated 6.9/10 on the CVSS scale. A vulnerability was found in markparticle WebServer up to 1.0. It has been declared as critical. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

6.9/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.57%

43.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Markparticle	Webserver	All versions

References

https://magnificent-dill-351.notion.site/Arbitrary-Memory-Writing-in-WebServer-1-0-1d1c693918ed80889711ebd44f7f9a31Broken Link
https://vuldb.com/?ctiid.305773Permissions Required, VDB Entry
https://vuldb.com/?id.305773Third Party Advisory, VDB Entry
https://vuldb.com/?submit.556273Third Party Advisory, VDB Entry

Timeline

Published: Apr 21, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-3845?

How severe is CVE-2025-3845?

CVE-2025-3845 has a CVSS score of 6.9/10 (MEDIUM severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.

How do I fix CVE-2025-3845?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-3845?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST