How severe is CVE-2021-43142?

No CVSS score has been assigned to CVE-2021-43142 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2021-43142?

CVE-2021-43142 affects the following packages: com.wutka:jox (Maven). Ecosystems affected: Maven.

How do I fix CVE-2021-43142?

The records we use list no patched version of com.wutka:jox for CVE-2021-43142. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

How do I detect CVE-2021-43142 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.wutka:jox, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2021-43142 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2021-43142 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2021-43142, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2021-43142?

CVE-2021-43142 has an EPSS (Exploit Prediction Scoring System) score of 1.5%, placing it in the 74th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2021-43142?

CVE-2021-43142 is classified as XML External Entity (XXE) (CWE-611). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2021-43142 published, and has it been updated?

CVE-2021-43142 was published on April 1, 2022 and was last updated on December 5, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕ Maven

Not in CISA KEV

CVE-2021-43142 — jox

CVE-2021-43142 is a XML External Entity (XXE) vulnerability in com.wutka:jox. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Improper Restriction of XML External Entity Reference in wutka jox

Published

Apr 1, 2022

Updated

Dec 5, 2024

Affected

1 pkg

Patched

See advisory

Exploits

1 known

Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.5%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs74th percentile — riskier than 74% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

☕com.wutka:jox

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

An XML External Entity (XXE) vulnerability exists in wutka jox 1.16 in the readObject method in JOXSAXBeanInput.

Affected Packages

1 total

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`com.wutka:jox`	all versions	No fix

Affected Products

1 product · 1 configurations

Application

joxjox_project

≤ 1.16

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

An XML External Entity (XXE) vulnerability exists in wuta jox 1.16 in th…

novysodope.github.ioNVDApr 2022

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.wutka:jox, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
The records we use list no patched version of com.wutka:jox for CVE-2021-43142. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

An XML External Entity (XXE) vulnerability exists in wutka jox 1.16 in the readObject method in JOXSAXBeanInput.

O3 Security · Impact-Aware SCA

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