Sandbox bypass via unsandboxed process worker

Sandbox bypass in jahlives openssl_encrypt before 1.4.0 allows attackers to run plugins without sandbox controls via process isolation. In openssl_encrypt/modules/plugin_system/plugin_sandbox.py, the default multiprocessing _plugin_worker path calls plugin.execute(context) directly and omits sandbox setup, the PluginImportGuard, and the file, network, process, and resource restrictions applied in the non-default threading path. Reachability depends on a deployment that accepts attacker-supplied plugins; once such a plugin is launched in the default mode, it gains filesystem, network, subprocess, and unrestricted Python module access instead of the intended sandbox.