VDB-305773 · Submit #556273 · CVE-2025-3845

markparticle WebServer up to 1.0 code/buffer/buffer.cpp Buffer::HasWritten writePos_ buffer overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.9	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical has been found in markparticle WebServer up to 1.0. The affected element is the function Buffer::HasWritten of the file code/buffer/buffer.cpp. This manipulation of the argument writePos_ causes buffer overflow. This vulnerability appears as CVE-2025-3845. The attack may be initiated remotely. In addition, an exploit is available.

Detailsinfo

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_ with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared at magnificent-dill-351.notion.site. This vulnerability is known as CVE-2025-3845. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

It is possible to download the exploit at magnificent-dill-351.notion.site. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

Web Server

Vendor

markparticle

Name

WebServer

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 7.9

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 7.3
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/21/2025 🔍
04/21/2025 +0 days 🔍
10/16/2025 +178 days 🔍

Sourcesinfo

Advisory: magnificent-dill-351.notion.site
Status: Not defined

CVE: CVE-2025-3845 (🔍)
GCVE (CVE): GCVE-0-2025-3845
GCVE (VulDB): GCVE-100-305773
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 04/21/2025 15:30
Updated: 10/16/2025 04:34
Changes: 04/21/2025 15:30 (57), 04/22/2025 11:45 (31), 10/16/2025 04:34 (11)
Complete: 🔍
Submitter: s0l42
Cache ID: 216::103

Submitinfo

Accepted

Submit #556273: markparticle WebServer 1.0 Arbitrary Memory Writing (by s0l42)