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CVE Record

CVE-2018-21234: Jodd before 5.0.4 performs Deserialization of Untrusted JSON Data when setClassMetadataName is set.

Jodd before 5.0.4 performs Deserialization of Untrusted JSON Data when setClassMetadataName is set.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This CVE affects Jodd before 5.0.4. If an application enables class metadata names and parses JSON supplied by untrusted users, that JSON may drive unsafe deserialization behavior. The public bundle does not provide CVSS, exploit reports, or product-specific exposure beyond Jodd and downstream dependency upgrade discussions.

Executive priority

Treat as a targeted dependency hygiene issue unless exposure is confirmed on internet-facing JSON inputs. Escalate priority if vulnerable Jodd usage is reachable with untrusted data.

Technical view

The issue is described as deserialization of untrusted JSON data in Jodd before 5.0.4 when setClassMetadataName is set. The linked Jodd 5.0.4 commit and version comparison are the only fix-direction evidence. Apache Hive mailing-list items show downstream dependency upgrades to address the CVE.

Likely exposure

Exposure is most likely in Java services using Jodd or jodd-core before 5.0.4, directly or transitively, where Jodd parses attacker-controlled JSON with class metadata enabled.

Exploitation context

The provided sources do not show active exploitation, public exploit maturity, CVSS scoring, or KEV listing. Risk depends on reachable JSON parsing paths and whether setClassMetadataName is configured.

Researcher notes

Evidence is sparse: the CVE record states the condition, GitHub references point to 5.0.4 changes, and Apache threads confirm downstream upgrade activity. No exploit details should be inferred from these sources.

Mitigation direction

  • Upgrade Jodd or jodd-core to 5.0.4 or later where applicable.
  • Check vendor guidance for downstream platforms bundling vulnerable Jodd versions.
  • Reduce or remove untrusted JSON parsing paths that rely on class metadata.
  • Prioritize internet-facing services and third-party data ingestion paths first.

Validation and detection

  • Inventory direct and transitive dependencies for Jodd or jodd-core before 5.0.4.
  • Review code/configuration for use of setClassMetadataName.
  • Identify request, API, or ingestion paths parsing untrusted JSON with Jodd.
  • Confirm patched dependency resolution in build artifacts and deployed runtimes.
Prepared
Confidence
medium
Sources
8

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

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CVE-2018-21234 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
15Source 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
n/an/an/aListed
Weakness

CWE details

No CWE listed

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