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CVE

CVE-2025-3845

A vulnerability was found in markparticle WebServer up to 1.0. It has been declared as critical. Affected by this vulner

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.

HIGH · CVSS 7.3 EPSS 0.01011
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules8 YARA rules0
⬡

Weakness Classification

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
▤

Affected Products & Versions

1
markparticle webserverall versions
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productcriticalCertificate Request Export to Exchange Webserver
productcriticalMailbox Export to Exchange Webserver
producthighRemove Exported Mailbox from Exchange Webserver
productmediumPython WebServer Execution - Linux
productmediumIIS WebServer Access Logs Deleted
productmediumTomcat WebServer Logs Deleted
▣

Scoring & Timeline

7.3
HIGH · CVSS v3.1 · cna@vuldb.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD21 Apr 2025 · 10:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://magnificent-dill-351.notion.site/Arbitrary-Memory-Writing-in-WebServer-1-0-1d1c693918ed80889711ebd44f7f9a31Broken Link
https://vuldb.com/?ctiid.305773Permissions RequiredVDB Entry
https://vuldb.com/?id.305773Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.556273Third Party AdvisoryVDB Entry
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