Language: TypeScript
Label: vulnerable
CWE: CWE-352 \u2014 Cross-Site Request Forgery (CSRF)
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.

Code:
export const getTestServer = (sessionOptions: SessionOptions = null) => {
  const server = fastify()
  loadSessionPlugins(server, sessionOptions)

  server.setErrorHandler((error, request, reply) => {
    console.error(error)
    void reply.status(500)
    void reply.send(error)
  })
  return server
}