Controller.cfc

<cfcomponent extends="Wheels">
  <cffunction name="init">
    <cfset filters(through="checkLogin", except="login,authenticate,logout,resetPassword,forgotPassword")>
  </cffunction>

  <cffunction name="checkLogin">
    <cfif StructKeyExists(session, "user")>
      <cfset loggedInUser = model("user").findByKey(session.user.id) />
      <cfif isDefined("session.gotoredirectparams")>
        <!--- make params what the previous ones before timeout --->
        <cfset params = structcopy(session.gotoredirectparams) />
        <!--- delete the struct from the session --->
        <cfset structDelete(session, "gotoredirectparams") />
      </cfif>
    <cfelse>
      <cfif IsStruct(params)>
        <cfset session.redirectparams = params />
        <cfset flashInsert(error="Your session timed out.  Please login again.")>
      </cfif>
      <cfset redirectTo(controller="security", action="login")/>
    </cfif>
  </cffunction>
</cfcomponent>

Security.cfc

<cfcomponent extends="Controller" output="false">
  <cffunction name="authenticate">
    ... other code ...
    <cfif isDefined("session.redirectparams")>
      <!--- make a copy of the struct so the next line doesn't interfere --->
      <cfset var args = structcopy(session.redirectparams) />
      <cfset session.gotoredirectparams= structcopy(session.redirectparams) />
      <!--- delete the struct from the session --->
      <cfset structDelete(session, "redirectparams") />
      <!--- redirect to the previously expected location --->
      <cfset redirectTo(argumentCollection=args) />
    <cfelse>
      ...
    </cfif>
  </cffunction>
</cfcomponent>