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Fencer Vulns
medium 5.3

CVE-2020-14338 json

Improper Input Validation in Xerces

published 2020-09-17 6 y ago modified 2026-09-10 1 mo ago also GHSA-w4jq-qh47-hvjq , EUVD-2022-1221

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven xerces:xercesImpl 2.12.0.sp3
  • redhat xerces 2.12.0
  • eap7-jberet jboss enterprise application platform 7.3 1.3.7-1.Final_redhat_00001.1.el6eap
  • eap7-jgroups jboss enterprise application platform 7.3 4.1.10-1.Final_redhat_00001.1.el6eap
  • eap7-wildfly jboss enterprise application platform 7.3 7.3.3-4.GA_redhat_00004.1.el6eap
  • eap7-narayana jboss enterprise application platform 7.3 5.9.9-1.Final_redhat_00001.1.el6eap
  • eap7-undertow jboss enterprise application platform 7.3 2.0.31-1.SP1_redhat_00001.1.el6eap
  • eap7-velocity jboss enterprise application platform 7.3 2.2.0-1.redhat_00001.1.el6eap
  • eap7-hibernate jboss enterprise application platform 7.3 5.3.18-1.Final_redhat_00001.1.el6eap
  • eap7-picketbox jboss enterprise application platform 7.3 5.0.3-8.Final_redhat_00007.1.el6eap

red hat advisories RHSA-2020:4244RHSA-2020:4246RHSA-2020:4245

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-14338 updated cvss 5.3

wildfly: XML validation manipulation due to incomplete application of use-grammar-pool-only in xercesImpl

  • Red Hat JBoss A-MQ 6 xercesImpl Red Hat JBoss BRMS 6 xercesImpl Red Hat JBoss Data Grid 7 xercesImpl Red Hat JBoss Data Virtualization 6 xercesImpl Red Hat JBoss Enterprise Application Platform 5 xercesImpl Red Hat JBoss Enterprise Application Platform 6 xercesImpl
    +5 more products
    Red Hat JBoss Enterprise Application Platform Continuous Delivery xercesImpl Red Hat JBoss Fuse 6 xercesImpl Red Hat JBoss Fuse Service Works 6 xercesImpl Red Hat JBoss Operations Network 3 xercesImpl Red Hat JBoss SOA Platform 5 xercesImpl
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Application Runtimes xercesImpl
    affected: no fix available
  • Red Hat EAP 7.3.3
    fixed: vendor fix RHSA-2020:4247
  • Red Hat Fuse 7.9
    fixed: vendor fix RHSA-2021:3140
  • Red Hat JBoss EAP 7.3 for BaseOS-8 eap7-artemis-native 1.0.2-3.redhat_1.el8eap, eap7-velocity 2.2.0-1.redhat_00001.1.el8eap, eap7-apache-cxf 3.3.7-1.redhat_00001.1.el8eap, eap7-snakeyaml 1.26.0-1.redhat_00001.1.el8eap, eap7-wildfly 7.3.3-4.GA_redhat_00004.1.el8eap, eap7-jberet 1.3.7-1.Final_redhat_00001.1.el8eap, +87 more
    fixed: vendor fix RHSA-2020:4245
  • Red Hat JBoss EAP 7.3 for RHEL 6 Server eap7-artemis-native 1.0.2-3.redhat_1.el6eap, eap7-velocity 2.2.0-1.redhat_00001.1.el6eap, eap7-apache-cxf 3.3.7-1.redhat_00001.1.el6eap, eap7-snakeyaml 1.26.0-1.redhat_00001.1.el6eap, eap7-wildfly 7.3.3-4.GA_redhat_00004.1.el6eap, eap7-jberet 1.3.7-1.Final_redhat_00001.1.el6eap, +87 more
    fixed: vendor fix RHSA-2020:4244
  • Red Hat JBoss EAP 7.3 for RHEL 7 Server eap7-artemis-native 1.0.2-3.redhat_1.el7eap, eap7-velocity 2.2.0-1.redhat_00001.1.el7eap, eap7-apache-cxf 3.3.7-1.redhat_00001.1.el7eap, eap7-snakeyaml 1.26.0-1.redhat_00001.1.el7eap, eap7-wildfly 7.3.3-4.GA_redhat_00004.1.el7eap, eap7-jberet 1.3.7-1.Final_redhat_00001.1.el7eap, +89 more
    fixed: vendor fix RHSA-2020:4246
  • Red Hat Single Sign-On 7.4.3
    fixed: vendor fix RHSA-2020:4931
show 4 more
  • Red Hat RHDM 7.10.0
    fixed: vendor fix RHSA-2021:0603
  • Red Hat RHPAM 7.10.0
    fixed: vendor fix RHSA-2021:0600
  • Red Hat Text-Only RHOAR
    fixed: vendor fix RHSA-2020:5361
  • Red Hat A-MQ Clients 2 xercesImpl
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.29% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N
GitHub 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
maven xerces:xercesImpl
<2.12.0.sp3
2.12.0.sp3

Affected products

  • n/a Wildfly

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.