Web Application Enumeration

Web Application Enumeration is a skill for Claude Code from allsmog/blackbox-claude-plugin. It costs 58 tokens per session (1,731 once invoked), scanned A, original, MIT.

Guidance for discovering web application content, identifying its technologies, and checking for possible vulnerabilities. It covers tools such as Gobuster, Feroxbuster, WhatWeb, and Nikto for authorised security testing.

In plain words
What is it for?
Fingerprinting web servers, scanning directories and files, finding subdomains, checking response headers, and performing web enumeration with tools such as gobuster and ffuf.
Why use it?
It provides a consistent way to map an unfamiliar web application and spot exposed paths, services, or technologies.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the blackbox-htb plugin — 17 skills, 11 commands, 9 agents shipped together

Good fit Fingerprinting web servers, scanning directories and files, finding subdomains, checking response headers, and performing web enumeration with tools such as gobuster and ffuf.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/allsmog/blackbox-claude-plugin/web-enumeration
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add allsmog/blackbox-claude-plugin --skill web-enumeration
Clone the repo
git clone --depth 1 https://github.com/allsmog/blackbox-claude-plugin

Made for: Claude Code.

Or install blackbox-htb, the plugin that ships this one along with the rest of its 17 skills, 11 commands, 9 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for Web Application Enumeration

README.md
[![agentmods](https://agentmods.dev/badge/skills/allsmog/blackbox-claude-plugin/web-enumeration.svg)](https://agentmods.dev/skills/allsmog/blackbox-claude-plugin/web-enumeration)
Your own site
<a href="https://agentmods.dev/skills/allsmog/blackbox-claude-plugin/web-enumeration"><img src="https://agentmods.dev/badge/skills/allsmog/blackbox-claude-plugin/web-enumeration.svg" alt="Measured on agentmods" height="20"></a>
Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,731 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00058 $0.01731
Opus 5 $0.00029 $0.00865
Sonnet 5 $0.00012 $0.00346
Haiku 4.5 $0.00006 $0.00173

Measured 8d ago against content hash 20636de88ec7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

Web Application Enumeration scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -I http://<TARGET>
blackbox-htb/skills/web-enumeration/SKILL.md · 259 lines

How it starts

The opening of the file, as written. The whole thing — 259 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Web Application Enumeration Skill

Overview

Techniques for discovering web content, identifying technologies, and finding vulnerabilities in web applications.

Technology Fingerprinting

Whatweb

# Basic scan
whatweb http://<TARGET>

# Aggressive scan
whatweb -a 3 http://<TARGET>

# Verbose output
whatweb -v http://<TARGET>

Manual Header Analysis

# Check response headers
curl -I http://<TARGET>

# Key headers to note:
# Server: Apache/2.4.41
# X-Powered-By: PHP/7.4
# X-AspNet-Version: 4.0.30319

Wappalyzer (Browser Extension)

  • Identifies CMS, frameworks, libraries
  • Shows JavaScript libraries
  • Detects analytics and marketing tools

Directory Fuzzing

Gobuster

# Basic directory scan
gobuster dir -u http://<TARGET> -w /usr/share/wordlists/dirb/common.txt

# With extensions
gobuster dir -u http://<TARGET> -w /usr/share/wordlists/dirb/common.txt \
    -x php,html,txt,bak,zip

# With authentication
gobuster dir -u http://<TARGET> -w wordlist.txt \
    -U admin -P password

# Ignore SSL errors
gobuster dir -u https://<TARGET> -w wordlist.txt -k

Feroxbuster (Recursive)

# Basic recursive scan
feroxbuster -u http://<TARGET> -w /usr/share/seclists/Discovery/Web-Content/raft-medium-directories.txt

# With extensions and depth
feroxbuster -u http://<TARGET> \
    -w /usr/share/seclists/Discovery/Web-Content/raft-medium-directories.txt \
    -x php,html,txt -d 3

# Quiet mode with output
feroxbuster -u http://<TARGET> -w wordlist.txt -q -o results.txt

FFUF (Fast Fuzzer)

# Directory fuzzing
ffuf -u http://<TARGET>/FUZZ -w wordlist.txt

# With extensions
ffuf -u http://<TARGET>/FUZZ -w wordlist.txt -e .php,.html,.txt

# Virtual host fuzzing
ffuf -u http://<TARGET> -H "Host: FUZZ.<DOMAIN>" \
    -w /usr/share/seclists/Discovery/DNS/subdomains-top1million-5000.txt \
    -fs <size_to_filter>

# POST parameter fuzzing
ffuf -u http://<TARGET>/login -X POST \
    -d "username=admin&password=FUZZ" -w passwords.txt

Read the full file on GitHub · 259 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 259 lines · 58 tokens per session scan A 20636de88ec7

Subscribe to this mod's changes

Web Application Enumeration is a skill published in the GitHub repository allsmog/blackbox-claude-plugin (5 stars, last pushed 6mo ago), licensed MIT. It adds 58 tokens to every session and 1,731 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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