CVE-2020-6958: An XXE vulnerability in JnlpSupport in Yet Another Java Service Wrapper (YAJSW) 12.14, as used in NSA Ghidra a

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CRITICAL 9.1REMOTEDOWNGRADE

CVE-2020-6958 is a critical-severity flaw (CVSS 9.1) affecting yet another java service wrapper. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An XXE vulnerability in JnlpSupport in Yet Another Java Service Wrapper (YAJSW) 12.14, as used in NSA Ghidra and other products, allows attackers to exfiltrate data from remote hosts and potentially cause denial-of-service.

Why this priority

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

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Weakness	CWE-611
Published	2020-01-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: yet another java service wrapper project

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

Am I affected?

Timeline

2020-01-14 00:15 UTCPublished CVE record published
2026-06-17 03:24 UTCUpdated Record last modified

yet another java service wrapper project yet another java service wrapper DOWNGRADE

Affected: 12.14

Fixed in: no fixed release known

Safe to downgrade to: a release before 12.14

1. Check installed version

apt-cache policy yet-another-java-service-wrapper || rpm -q yet-another-java-service-wrapper || yet-another-java-service-wrapper --version

2. No fixed release: DOWNGRADE to a release before 12.14 (Debian / Ubuntu)

apt-cache madison yet-another-java-service-wrapper sudo apt install yet-another-java-service-wrapper=<VERSION_BEFORE_12.14> sudo apt-mark hold yet-another-java-service-wrapper

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list yet-another-java-service-wrapper sudo dnf downgrade yet-another-java-service-wrapper-<VERSION_BEFORE_12.14> sudo dnf versionlock add yet-another-java-service-wrapper

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2020-6958?

yet another java service wrapper: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-6958 being exploited?

CVE-2020-6958 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-2020-6958 affect?

CVE-2020-6958 affects yet another java service wrapper. Severity is critical (CVSS 9.1). An XXE vulnerability in JnlpSupport in Yet Another Java Service Wrapper (YAJSW) 12.14, as used in NSA Ghidra and other products, allows attackers to exfiltrate data from remote hosts and potentially cause denial-of-service.

How urgent is CVE-2020-6958?

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

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References

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