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Synthesis of the vulnerability 
An attacker can bypass restrictions via Xerces XMLSchemaValidator use-grammar-pool-only of WildFly, in order to escalate his privileges.
 Vulnerable products: JBoss EAP by Red Hat, Red Hat SSO, WildFly.
Severity of this weakness: 2/4.
Creation date: 18/09/2020.
Références of this bulletin: CVE-2020-14338, RHBUG-1860054, RHSA-2020:4244-01, RHSA-2020:4245-01, RHSA-2020:4246-01, RHSA-2020:4247-01, RHSA-2020:4929-01, RHSA-2020:4930-01, RHSA-2020:4931-01, RHSA-2020:4932-01, VIGILANCE-VUL-33366.
Description of the vulnerability 
An attacker can bypass restrictions via Xerces XMLSchemaValidator use-grammar-pool-only of WildFly, in order to escalate his privileges.
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This computer weakness impacts software or systems such as JBoss EAP by Red Hat, Red Hat SSO, WildFly.
Our Vigil@nce team determined that the severity of this vulnerability note is medium.
The trust level is of type confirmed by the editor, with an origin of document.
An attacker with a expert ability can exploit this cybersecurity threat.
Solutions for this threat 
Red Hat JBoss EAP: version 7.3.3.
The version 7.3.3 is fixed:
https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=appplatform&downloadType=securityPatches&version=7.3
Red Hat Single Sign-On: version 7.4.3.
The version 7.4.3 is fixed:
https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=core.service.rhsso&downloadType=securityPatches&version=7.4
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