CVE-2021-43142: An XML External Entity (XXE) vulnerability exists in wuta jox 1.16 in the readObject method in JOXSAXBeanInput

Q: How do I fix CVE-2021-43142?

jox: upgrade to newer than 1.16. Exact commands for each OS are on this page.

Q: Is CVE-2021-43142 being exploited?

CVE-2021-43142 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-43142 affect?

CVE-2021-43142 affects jox. Severity is critical (CVSS 9.8). An XML External Entity (XXE) vulnerability exists in wuta jox 1.16 in the readObject method in JOXSAXBeanInput.

Q: How urgent is CVE-2021-43142?

Priority 63/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2021-43142 is a critical-severity flaw (CVSS 9.8) affecting jox. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-611
Published	2022-03-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: jox project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-03-30 22:15 UTCPublished CVE record published
2026-06-17 04:10 UTCUpdated Record last modified

jox project jox UPGRADE

Affected: <= 1.16

Fixed in: newer than 1.16

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy jox || rpm -q jox || jox --version

2. UPGRADE to newer than 1.16 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade jox

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade jox

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-43142?

jox: upgrade to newer than 1.16. Exact commands for each OS are on this page.

Is CVE-2021-43142 being exploited?

CVE-2021-43142 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-43142 affect?

CVE-2021-43142 affects jox. Severity is critical (CVSS 9.8). An XML External Entity (XXE) vulnerability exists in wuta jox 1.16 in the readObject method in JOXSAXBeanInput.

How urgent is CVE-2021-43142?

Priority 63/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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