Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-4295

30
FAUCET Score

CVE-2021-4295 is a critical XML External Entity (XXE) vulnerability affecting the ONC code-validator-api up to version 1.0.30, specifically within the vocabularyValidationConfigurations function of its XML Handler component. This flaw allows for remote, unauthenticated attackers to achieve high impact on confidentiality, integrity, and availability, as indicated by its CVSS score of 9.8. While a patch (version 1.0.31) is available, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.31CPE matchmatch criteria
cpe:2.3:a:healthit:code-validator-api:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
2.1
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.72%
Probability of exploitation in next 30 days
EPSS Percentile
50.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0072 is in the 33rd percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / onc-healthit/code-validator-api/commit/fbd8ea121755a2d3d116b13f235bc8b61d8449af
PatchThird Party Advisory
github.com / onc-healthit/code-validator-api/pull/97
Third Party Advisory
github.com / onc-healthit/code-validator-api/releases/tag/1.0.31
Third Party Advisory
vuldb.com
Third Party Advisory
vuldb.com
Third Party Advisory