markparticle WebServer buffer.cpp HasWritten buffer overflow
Priority HIGH 70CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00696 53rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| markparticle | WebServer | 1.0 | — | No fix listed | CNA |
- WebServer Vendormarkparticle Affected 1.0 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:markparticle:webserver:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | markparticle |
- cpe:2.3:a:markparticle:webserver:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·markparticle
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-3845
- 2026-10-03 Alias added: GHSA-8q95-7vjm-3mfq
References
More markparticle Webserver vulnerabilities
- TI-2025-03397 markparticle WebServer Login httprequest.cpp sql injection CVSS 4.0MEDIUM 6.9
- TI-2025-03396 markparticle WebServer Registration httprequest.cpp sql injection CVSS 4.0MEDIUM 6.9
Sources
- CVE-2025-3845 · CVE Program
- CVE-2025-3845 · NVD
- FIRST EPSS
- GHSA-8q95-7vjm-3mfq · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences