CVE-2018-21234

CRITICALNVD 9.89.8—Elevated

9.8

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

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 96.3%
KEV: Not listed

Published

May 21, 2020

Last Modified

November 21, 2024

References (28)

Affected Packages

(1 across 1 ecosystem)

Maven(1)

Package	Vulnerable range	Fixed in	Dependents
org.jodd:jodd-json	3.6 ... 5.0.3 (37 versions)	5.0.4	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-502Deserialization of Untrusted Data

Data Freshness Timeline

(refreshed 10× in last 7d / 16× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 03:24 UTCEG score recompute
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 00:16 UTCOSV refresh

Frequently asked(5)

What is CVE-2018-21234?

CVE-2018-21234 is a critical vulnerability published on May 21, 2020. Jodd before 5.0.4 performs Deserialization of Untrusted JSON Data when setClassMetadataName is set.

When was CVE-2018-21234 disclosed?

CVE-2018-21234 was first published in the National Vulnerability Database on May 21, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-21234 actively exploited?

CVE-2018-21234 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 96.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-21234?

CVE-2018-21234 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2018-21234?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-21234, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-21234

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CVE-2018-21234

📅 Published

🔄 Last Modified

🔗 References (28)

Affected Packages

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-21234?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (28)

Frequently asked(5)

Related CVEs(same CWE)