CVE-2024-39847Public exploitNetwork attack vector

File read and SSRF via external XML entities

Published Apr 30, 2026 · Updated Apr 30, 2026

XML external entity injection in the SOAP endpoint of 4D Server 20 R3 and earlier allows remote attackers to read files and issue HTTP GET requests. The /4DSOAP parser resolves attacker-supplied external DTDs and file or HTTP entity URIs, returning file contents in faults or sending them out of band. No authentication is required, and a reachable SOAP endpoint exposes server files, adjacent shares, and HTTP services accessible from the server.

CVSS severity8.7
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XML external entity injection in the SOAP endpoint of 4D Server 20 R3 and earlier allows remote attackers to read files and issue HTTP GET requests. The /4DSOAP parser resolves attacker-supplied external DTDs and file or HTTP entity URIs, returning file contents in faults or sending them out of band. No authentication is required, and a reachable SOAP endpoint exposes server files, adjacent shares, and HTTP services accessible from the server.

The record

CVE
CVE-2024-39847
Published
Apr 30, 2026
Updated
Apr 30, 2026
Vendor
4D
Product
4D Server
Classifications
CWE-611, T1005, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=* <=v20 R3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

4D · 4D Serverversion=* <=v20 R3

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.7SCHUTZWERKCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1005Data from Local System
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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