CVE-2021-41042Network attack vector

External resource retrieval via unrestricted TransformerFactory

Published Jul 7, 2022 · Updated Aug 4, 2024

XXE in Eclipse Lyo 1.0.0 through 4.1.0 allows attackers to trigger external DTD retrieval through crafted RDF/XML input. JenaModelHelper.createTransformer initializes TransformerFactory with defaults that permit external DTD and stylesheet access. Reachability requires a consuming application to pass untrusted RDF/XML to the provider; authentication is deployment-specific, and the bounded effect is server-side external resource retrieval.

CVSS severity4.2
Medium
EPSS probability0.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in Eclipse Lyo 1.0.0 through 4.1.0 allows attackers to trigger external DTD retrieval through crafted RDF/XML input. JenaModelHelper.createTransformer initializes TransformerFactory with defaults that permit external DTD and stylesheet access. Reachability requires a consuming application to pass untrusted RDF/XML to the provider; authentication is deployment-specific, and the bounded effect is server-side external resource retrieval.

The record

CVE
CVE-2021-41042
Published
Jul 7, 2022
Updated
Aug 4, 2024
Vendor
The Eclipse Foundation
Product
Eclipse Lyo
Classifications
CWE-611
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Jul 7, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

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  1. Affected versionversion=1.0.0 <unspecified
  2. Affected versionversion=unspecified <=4.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

The Eclipse Foundation · Eclipse Lyoversion=1.0.0 <unspecified; version=unspecified <=4.1.0

Published CVSS scores

4.2GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference

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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