Finding Attack Actions (for Attack Flow) shared between posts

Take the Attack Actions for this post

How can I take one, say “Route traffic through proxies/port-forwards”, and find all posts that describe the action?

Attack Actions are unique to a post, because in many cases they talk about specifics of what is being described (you can see this most clearly in the description of the attack-action)

{
  "created": "2025-12-19T04:37:54.419562Z",
  "description": "Using tools like Chisel and ReverseSSH, the actor sets up SOCKS/port-forwarding and proxy-like channels to relay C2 and operational traffic through intermediate endpoints.",
  "effect_refs": [
    "attack-action--bf3c3635-4ec7-5fe8-a0bc-4069fba22ee8"
  ],
  "extensions": {
    "extension-definition--fb9c968a-745b-4ade-9b25-c324172197f4": {
      "extension_type": "new-sdo"
    }
  },
  "id": "attack-action--f8ffe069-6a81-5d40-9afe-4776f63f6910",
  "modified": "2025-12-19T04:37:54.419562Z",
  "name": "Route traffic through proxies/port-forwards",
  "spec_version": "2.1",
  "tactic_id": "TA0011",
  "tactic_ref": "x-mitre-tactic--f72804c5-f15a-449e-a5da-2eecd181f813",
  "technique_id": "T1090",
  "technique_ref": "attack-pattern--731f4f55-b6d0-41d1-a7a9-072a66389aea",
  "type": "attack-action"
}

In short, the ID attack-action will only ever be linked to one post.

However, the MITRE ATT&CK Technique level can be used to do what you want.

In the Attack Action above you can see it is linked to T1090: Proxy.

So you can use this object as the pivot point for your search to get what you want.