## Apprentice Level - ✅ [[1. File path traversal, simple case]] ## Practitioner Level - ✅ [[2. File path traversal, traversal sequences blocked with absolute path bypass]] - ✅ [[3. File path traversal, traversal sequences stripped non-recursively]] - ✅ [[4. File path traversal, traversal sequences stripped with superfluous URL-decode]] - ✅ [[5. File path traversal, validation of start of path]] - ✅ [[6. File path traversal, validation of file extension with null byte bypass]]