Security Policy Supported Versions Apache XML Security for Java Version Supported 2.3.x ✅ 2.2.x ✅ 2.1.x ✅ < 2.1.x ❌ Apache XML Security for C++ Version Supported 2.0.x ✅ < 2.0.x ❌ Reporting a Vulnerability For information on how to report a new security problem please see here. Our existing security advisories are published here.