Individual skill
detecting-directory-listing
Probe a target for directories that return auto-generated index listings instead of denying or serving a specific file — exposes the full file tree under any reachable directory, including files the application never linked to. Use when: post-deploy verification on a static-asset host, security audit before SOC2, or following up on a finding from skill #6 (exposed-files) where a backup-file path returned 200 with HTML body instead of the expected file content (suggests autoindex serving a directory listing). Threshold: any directory-shaped path returns 200 with HTML body matching the framework-specific autoindex fingerprint (nginx fancyindex, Apache mod_autoindex Index of/, Caddy browse, Lighttpd mod_dirlisting, etc.). Trigger with: "directory listing check", "autoindex detection", "open directory scan".
skills/.curated/detecting-directory-listing/SKILL.md
Source commit 0500b275e963c027f6b410e8c49c0446945c574e
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- No
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Not checked yet
- Last checked
- Nov 12, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
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Repository context
- Repository stars (not skill ratings)
- 2,917
- Repository last updated
- Nov 12, 2026
- License
- MIT
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- ai Repository topic
- automation Repository topic
- claude-code Repository topic
- devops Repository topic
- mcp Repository topic
- ai-agents Repository topic
- anthropic Repository topic
- claude-code-plugins Repository topic
- developer-tools Repository topic
- llm Repository topic
- security Declared skill tag
- information-disclosure Declared skill tag
- autoindex Declared skill tag
- pentest Declared skill tag
- security Derived category
Files and excerpt
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SKILL.mdcore · 7,433 bytesSKILL.mdcore · 7,433 bytesSKILL.mdcore · 7,433 bytesSKILL.mdcore · 7,433 bytesreferences/PLAYBOOK.mddoc · 6,798 bytesreferences/THEORY.mddoc · 6,533 bytesscripts/probe_directory_listing.pyruns · 7,562 bytes
Read excerpt
# Detecting Directory Listing
## Overview
Web servers can be configured to auto-generate an HTML index page
when a request hits a directory without a matching default file
(no `index.html` / `index.php` / etc.). The auto-generated page
lists every file in the directory. This is by design for static-
file servers and FTP-style file-sharing setups; it's a misconfiguration
on application servers where the file tree was never meant to be
public.
The risk compounds in two ways:
