A flaw was found where some utility classes in Drools core did not use proper safeguards when deserializing data. This flaw allows an authenticated attacker to construct malicious serialized objects (usually called gadgets) and achieve code execution on the server.

drools <=7.59.x is affected by an XML External Entity (XXE) vulnerability in KieModuleMarshaller.java. The Validator class is not used correctly, resulting in the XXE injection vulnerability.

Drools Workbench contains a path traversal vulnerability. The vulnerability allows a remote, authenticated attacker to bypass the directory restrictions and retrieve arbitrary files from the affected host.

XML external entity (XXE) vulnerability in Drools and jBPM before 6.2.0 allows remote attackers to read arbitrary files or possibly have other unspecified impact via a crafted BPMN2 file.

JBoss Drools, Red Hat JBoss BRMS before 6.0.1, and Red Hat JBoss BPM Suite before 6.0.1 allows remote authenticated users to execute arbitrary Java code via a (1) MVFLEX Expression Language (MVEL) or (2) Drools expression.