The BusinessWorks engine component of TIBCO Software Inc.'s TIBCO ActiveMatrix BusinessWorks, TIBCO ActiveMatrix BusinessWorks for z/Linux, and TIBCO ActiveMatrix BusinessWorks Distribution for TIBCO Silver Fabric contains a vulnerability that may allow XML eXternal Entity (XXE) attacks via incoming network messages, and may disclose the contents of files accessible to a running BusinessWorks engine Affected releases are TIBCO Software Inc. TIBCO ActiveMatrix BusinessWorks: versions up to and including 5.13.0, TIBCO ActiveMatrix BusinessWorks for z/Linux: versions up to and including 5.13.0, TIBCO ActiveMatrix BusinessWorks Distribution for TIBCO Silver Fabric: versions up to and including 5.13.0.