CVE-2024-55887Network attack vector

Host-data disclosure via external entity resolution

Published Dec 13, 2024 · Updated Dec 13, 2024

XXE in UcumEssenceService in HL7 FHIR Foundation Ucum-java before 1.0.9 allows remote attackers to read host data via crafted XML. UcumEssenceService processes attacker-controlled DTD external-entity references, causing referenced host data to be included in its XML output. Exposure requires a host application that instantiates the library with XML submitted by external clients; the reported consequence is host-data disclosure.

CVSS severity8.6
High
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in UcumEssenceService in HL7 FHIR Foundation Ucum-java before 1.0.9 allows remote attackers to read host data via crafted XML. UcumEssenceService processes attacker-controlled DTD external-entity references, causing referenced host data to be included in its XML output. Exposure requires a host application that instantiates the library with XML submitted by external clients; the reported consequence is host-data disclosure.

The record

CVE
CVE-2024-55887
Published
Dec 13, 2024
Updated
Dec 13, 2024
Vendor
HL7 FHIR Foundation
Product
Ucum-java
Classifications
CWE-611, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 13, 2024Record 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=< 1.0.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HL7 FHIR Foundation · Ucum-javaversion=< 1.0.9

Published CVSS scores

8.6GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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