Java EUVD-2025-21327

{'type': 'Immediate Patch', 'action': 'Upgrade to one of the following supported versions based on your Java runtime: Apache Jackrabbit 2.20.17 (for Java 8 environments, though Java 8 is EOL), 2.22.1 (for Java 11), or 2.23.2 (for Java 11, recommended for new deployments).'} {'type': 'Configuration Mitigation (if patch cannot be immediately applied)', 'action': "Restrict XML privilege source to trusted, internal systems only. Implement network-level access controls to limit which systems can load privilege definitions. Disable external DTD processing at the JVM level using system properties: -Dcom.sun.org.apache.xerces.internal.XMLConstants.ACCESS_EXTERNAL_DTD='' and -Dcom.sun.org.apache.xerces.internal.XMLConstants.ACCESS_EXTERNAL_SCHEMA=''."} {'type': 'Access Control', 'action': 'Audit and minimize the number of accounts with privilege administration or content repository configuration rights, as exploitation requires authentication.'} {'type': 'Verification', 'action': 'After patching, verify the XML parser configuration in privilege loading code uses XXE-safe defaults (e.g., XMLInputFactory with FEATURE_SECURE_PROCESSING enabled, DTDProcessing.PROHIBIT, or equivalent hardening).'} {'type': 'Vendor Advisory', 'action': 'Refer to Apache Jackrabbit security advisory at https://jackrabbit.apache.org/security-advisories.html for detailed patch notes and breaking changes.'}