What’s Vulnerable › Vulnerabilities

CVE-2020-14338

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-09-17 · updated 2026-06-17
• Weakness: CWE-20

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.

Affected products

• RedHat Xerces: before 2.12.0; 2.12.0-sp1, 2.12.0-sp2 — fixed in 2.12.0

How to fix

Upgrade to a fixed version: RedHat Xerces 2.12.0. Check the vendor advisory for mitigations.

References

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