Foxit Reader 8.3.1.21155 XFA Node Object formNodes privilege escalation

A vulnerability was found in Foxit Reader 8.3.1.21155 (Document Reader Software). It has been declared as critical. Affected by this vulnerability is the function formNodes of the component XFA Node Object Handler. Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.