CVE-2020-14338 Improper Input Validation in Xerces
A flaw in Wildfly's Xerces XML validation allows crafted XML files to manipulate the validation process, requiring an upgrade to fix.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-14338?
CVE-2020-14338 is a medium-severity vulnerability in Wildfly, published on 17 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-20
Which versions are affected by CVE-2020-14338?
2 open source packages ship an affected version, including xerces:xercesImpl. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
xerces:xercesImpl Maven | All versions | 2.12.0.sp3 |
xerces:xercesImpl Maven | All versions | 2.12.0.sp3 |
Products include Redhat Xerces.
How do I fix CVE-2020-14338?
Upgrade xerces:xercesImpl to 2.12.0.sp3 or later.
Is CVE-2020-14338 being exploited?
There is no known exploitation of CVE-2020-14338 in the wild and no public exploit code.
Sources
Also known as CLEANSTART-2026-WN90580, CLSA-2026-1775089631, GHSA-w4jq-qh47-hvjq.