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easyLFIFree

Traverse

Traverse Docs' knowledge base. A clean documentation site — but how does it serve those pages under the hood?

The Scenario

Traverse is a four-person developer-tools startup out of Berlin that launched their API product in 2023 and rewrote the docs portal last month after a Show-HN thread complained the old one felt sluggish. The new version was put together by the founding engineer in a single caffeinated weekend, modelled on a tutorial blog post they half-read on the plane home from a conference. It looks the part — they have not yet had time to revisit how it actually serves pages.

Challenge Intel

Synopsis

A beginner local file inclusion lab hiding behind a professional-looking documentation site.

What It Is

Traverse Docs renders its knowledge base by loading pages dynamically based on user-supplied identifiers. That convenience feature was implemented without the guardrails you'd want on any filesystem-backed loader. A friendly introduction to path-traversal and LFI thinking in a clean, believable environment.

Who It's For

Beginners practising path traversal on a realistic but forgiving target.

Skills You'll Practice

  • Path traversal fundamentals
  • Local file inclusion against content loaders
  • Recognising unsafe file-resolution patterns
  • Basic payload iteration and tuning
  • Reading responses for inclusion signals

What You'll Gain

  • A satisfying first LFI solve on a professional-feeling app
  • A foundation of path-traversal intuition to build on
  • Familiarity with how docs and CMS features can go wrong
  • Vocabulary to describe LFI findings in write-ups

Ready to hack Traverse?

This challenge is free. Sign up and start hacking.