HOMEVULNERABILITIESCVE-2021-39384
CRITICAL

CVE-2021-39384

CWE-434Published: March 20, 2022· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

DWSurvey v3.2.0 was discovered to contain an arbitrary file write vulnerability via the component /utils/ToHtmlServlet.java.

NVD Source

Risk Analysis

DWSurvey v3.2.0 is affected by an arbitrary file write vulnerability, which can lead to remote code execution. This critical flaw allows attackers to write malicious files to the server. The CVSS score of 9.8 reflects the high severity of this vulnerability.

There is no known public exploit, and it is not in the KEV catalog. The vulnerability is remotely exploitable with low attack complexity.

Recommended Action

Users should upgrade to a secure version of DWSurvey or apply vendor-supplied patches to remediate the file write vulnerability.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-39384 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

diaowen1 product(s)
dwsurvey
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
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Official Patches & Advisories

All References (2)

https://github.com/wkeyuan/DWSurvey/issues/80Exploit · Issue Tracking · Third Party Advisory
https://github.com/wkeyuan/DWSurvey/issues/80Exploit · Issue Tracking · Third Party Advisory

Quick Facts

CVE IDCVE-2021-39384
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-434
CISA KEVNo
Affected1 vendor(s)
PublishedMar 20, 2022

Related CVEs (CWE-434)

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2021-39384 in threat intel feeds
  • Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.