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CVE Record

CVE-2021-41042: In Eclipse Lyo versions 1.0.0 to 4.1.0, a TransformerFactory is initialized with the defaults that do not r...

In Eclipse Lyo versions 1.0.0 to 4.1.0, a TransformerFactory is initialized with the defaults that do not restrict DTD loading when working with RDF/XML. This allows an attacker to cause an external DTD to be retrieved.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

Eclipse Lyo can process RDF/XML in a way that allows an attacker-controlled document to make the application retrieve an external DTD. That creates a security concern around systems that parse untrusted RDF/XML, but the supplied sources do not provide a CVSS score, confirmed exploitation, or a named patch.

Executive priority

Treat as a targeted dependency review item, not an emergency based on current evidence. Prioritize systems that parse untrusted RDF/XML or have outbound network access from parsing workloads.

Technical view

CVE-2021-41042 is a CWE-611 issue in Eclipse Lyo 1.0.0 through 4.1.0. A TransformerFactory is initialized with defaults that do not restrict DTD loading during RDF/XML handling, allowing external DTD retrieval. The public record does not document broader impact, exploit maturity, or remediation details.

Likely exposure

Exposure is most likely where Eclipse Lyo 1.0.0 through 4.1.0 processes RDF/XML influenced by users, partners, integrations, or external systems. Internal-only use with trusted RDF/XML has lower apparent exposure, based on the limited source details.

Exploitation context

The source bundle does not show CISA KEV listing, active exploitation, public exploit status, or exploitation prevalence. The described condition requires RDF/XML processing where an attacker can influence content that triggers external DTD retrieval.

Researcher notes

The public description is narrow: external DTD retrieval via default TransformerFactory behavior. Do not assume file disclosure, SSRF impact, or RCE without additional evidence. Severity and patch information are incomplete in the supplied sources.

Mitigation direction

  • Inventory applications and services using Eclipse Lyo 1.0.0 through 4.1.0.
  • Check Eclipse Lyo project guidance for fixed versions or recommended configuration changes.
  • Restrict DTD and external entity loading in XML/RDF processing where configurable.
  • Limit network egress from RDF/XML parsing services to reduce external retrieval risk.
  • Avoid processing untrusted RDF/XML until vendor guidance is applied.

Validation and detection

  • Confirm whether Eclipse Lyo is present in application dependency manifests or build artifacts.
  • Identify code paths that parse RDF/XML from user-controlled or partner-controlled sources.
  • Review XML transformer configuration for DTD and external entity restrictions.
  • Check runtime egress controls for services performing RDF/XML processing.
  • Track vendor issue status and CVE updates for remediation details.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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cve · low confidence lookup

CVE-2021-41042 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
The Eclipse FoundationEclipse Lyo1.0.0, unspecifiedListed
Weakness

CWE details

CWE-611

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-611 · source CWE mapping

Improper Restriction of XML External Entity Reference

Improper Restriction of XML External Entity Reference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs