CVE-2021-4295: A vulnerability classified as problematic was found in ONC code-validator-api up to 1.0.30

Q: How do I fix CVE-2021-4295?

code-validator-api: upgrade to 1.0.31. Exact commands for each OS are on this page.

Q: Is CVE-2021-4295 being exploited?

CVE-2021-4295 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-2021-4295 affect?

CVE-2021-4295 affects code-validator-api. Severity is medium (CVSS 5.5). A vulnerability classified as problematic was found in ONC code-validator-api up to 1.0.30. This vulnerability affects the function vocabularyValidationConfigurations of the file src/main/java/org/sitenv/vocabularies/configuration/CodeValid

Q: How urgent is CVE-2021-4295?

Priority 33/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADE

CVE-2021-4295 is a medium-severity flaw (CVSS 5.5) affecting code-validator-api. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability classified as problematic was found in ONC code-validator-api up to 1.0.30. This vulnerability affects the function vocabularyValidationConfigurations of the file src/main/java/org/sitenv/vocabularies/configuration/CodeValidatorApiConfiguration.java of the component XML Handler. The manipulation leads to xml external entity reference. Upgrading to version 1.0.31 is able to address this issue. The name of the patch is fbd8ea121755a

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-611
Published	2022-12-29
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: healthit

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

Am I affected?

Timeline

2022-12-29 09:15 UTCPublished CVE record published
2026-06-17 04:19 UTCUpdated Record last modified

healthit code-validator-api UPGRADE

Affected: < 1.0.31

Fixed in: 1.0.31

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy code-validator-api || rpm -q code-validator-api || code-validator-api --version

2. UPGRADE to 1.0.31 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade code-validator-api

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade code-validator-api

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-2021-4295?

code-validator-api: upgrade to 1.0.31. Exact commands for each OS are on this page.

Is CVE-2021-4295 being exploited?

CVE-2021-4295 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-2021-4295 affect?

CVE-2021-4295 affects code-validator-api. Severity is medium (CVSS 5.5). A vulnerability classified as problematic was found in ONC code-validator-api up to 1.0.30. This vulnerability affects the function vocabularyValidationConfigurations of the file src/main/java/org/sitenv/vocabularies/configuration/CodeValid

How urgent is CVE-2021-4295?

Priority 33/100. No elevated risk signals yet.

Software pages

Java vulnerabilities

References

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