webapp-exploit-hunter

webapp-exploit-hunter is a skill for Claude Code, Codex from Orizon-eu/claude-code-pentest. It costs 107 tokens per session (2,037 once invoked), scanned B, original, MIT.

An authorised web-application security testing workflow that crawls a website, finds endpoints and inputs, tests for common vulnerabilities, and generates proof-of-concept examples. It is intended only for sites the user is explicitly allowed to test.

In plain words
What is it for?
Mapping website pages, forms, API endpoints, and hidden paths; testing for issues such as SQL injection, cross-site scripting, request forgery, access-control errors, and authentication bypasses; and producing working demonstrations of findings.
Why use it?
It helps security testers find weaknesses that may be missed by checking pages manually, while keeping testing tied to an approved target and its restrictions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Mapping website pages, forms, API endpoints, and hidden paths; testing for issues such as SQL injection, cross-site scripting, request forgery, access-control errors, and authentication bypasses; and producing working demonstrations of findings.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/orizon-eu/claude-code-pentest/webapp-exploit-hunter
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 Orizon-eu/claude-code-pentest --skill webapp-exploit-hunter
Clone the repo
git clone --depth 1 https://github.com/Orizon-eu/claude-code-pentest

Made for: Claude Code, Codex.

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 webapp-exploit-hunter

README.md
[![agentmods](https://agentmods.dev/badge/skills/orizon-eu/claude-code-pentest/webapp-exploit-hunter/github.svg)](https://agentmods.dev/skills/orizon-eu/claude-code-pentest/webapp-exploit-hunter)
Your own site
<a href="https://agentmods.dev/skills/orizon-eu/claude-code-pentest/webapp-exploit-hunter"><img src="https://agentmods.dev/badge/skills/orizon-eu/claude-code-pentest/webapp-exploit-hunter/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for webapp-exploit-hunter

Your own site · 80×15
<a href="https://agentmods.dev/skills/orizon-eu/claude-code-pentest/webapp-exploit-hunter"><img src="https://agentmods.dev/badge/skills/orizon-eu/claude-code-pentest/webapp-exploit-hunter.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 107 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,037 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. 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 $0.00107 $0.02037
Opus 5.5 $0.00043 $0.00815
Sonnet 5.5 $0.00021 $0.00407
Haiku 4.5 $0.00011 $0.00204

Measured 1mo ago against content hash 6c61d3e0dc33, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

webapp-exploit-hunter scanned grade B with 2 findings 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 1mo ago.

The scan reads SKILL.md. This mod also ships 11 executable files (scripts/auth_tester.py, scripts/crawler.py, scripts/generate_poc.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Cloud metadata endpointmediumServer-side request forgery

One request to 169.254.169.254 can return temporary IAM credentials.

- Cloud metadata: 169.254.169.254 (AWS), metadata.google.internal (GCP)

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Makes network callslowCapability

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

1. **curl command** that demonstrates the vulnerability
webapp-exploit-hunter/SKILL.md · 258 lines

How it starts

The opening of the file, as written. The whole thing — 258 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Webapp Exploit Hunter

Intelligent web application vulnerability scanner. Context-aware testing that adapts to the target's technology stack.

Important

CRITICAL: Only test web applications you have explicit authorization to test (pentest agreement, bug bounty program, or own infrastructure).

Instructions

Step 1: Target Setup

Accept input as:

  1. Single domain or URL
  2. List of domains/URLs (from recon-dominator output or manual list)
  3. Specific endpoint to test

For each target, determine:

  • Is it in scope?
  • What technology stack is it running? (use tech_fingerprint.py from recon-dominator or fingerprint inline)
  • Are there any testing restrictions (rate limits, no automated scanning, etc.)?

Step 2: Crawling and Endpoint Discovery

python scripts/crawler.py --target {url} --depth 3

Intelligent crawling:

  1. Spider all linked pages up to configured depth
  2. Extract forms and input parameters
  3. Identify API endpoints from JavaScript files
  4. Parse robots.txt and sitemap.xml for hidden paths
  5. Fuzz for common hidden endpoints

Output: Structured map of all endpoints with parameters.

Step 3: Parameter Classification

For each discovered parameter, classify:

  • Input type: string, numeric, email, URL, file path, JSON, XML
  • Reflection: Is input reflected in response? Where? (HTML body, attribute, JS, header)
  • Sink type: Database query, file system, HTTP request, template, command, redirect
  • Authentication: Does the endpoint require auth?

This classification determines which vulnerability tests are relevant.

Step 4: Vulnerability Testing

Run tests based on parameter classification. Order by severity:

4a. SQL Injection
python scripts/sqli_tester.py --target {url} --params {param_file}

Test types:

  • Error-based: Single quote, double quote, comment injection
  • Boolean-based blind: True/false condition comparison
  • Time-based blind: SLEEP/WAITFOR/pg_sleep injection
  • UNION-based: Column count detection + data extraction
  • Second-order: Stored input used later in queries

Read the full file on GitHub · 258 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. 1mo ago First seen · 258 lines · 107 tokens per session scan B 6c61d3e0dc33

Subscribe to this mod's changes

webapp-exploit-hunter is a skill published in the GitHub repository Orizon-eu/claude-code-pentest (28 stars, last pushed 7mo ago), licensed MIT. It adds 107 tokens to every session and 2,037 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it B with 2 findings (cloud metadata endpoint, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

Other skills, from other repositories

forensics-kit

Digital forensics and incident response toolbox. Load when the operator asks about a pcap, a binary, a memory dump, a suspicious file, malware triage, IOC hunting, or post-incident analysis. Covers network (tshark), binaries (radare2, strings, binwalk, file, exiftool), memory (volatility), and pattern matching (YARA).…

FrancescoStabile/numasec · 101 tokens

passive-osint

Passive reconnaissance against a target without sending traffic that could alert it. Load when the engagement starts, when you only know a domain/email/username, when scope is unclear, or when you need historical surface area. Covers subdomain enumeration (crt.sh, subfinder), historical archives (wayback), DNS posture…

FrancescoStabile/numasec · 99 tokens

bugcrowd-reporting

Bugcrowd-specific reporting tactics complementing report-writing: VRT category search-and-fallback strategy when no exact match exists, manual severity override when VRT defaults underrate impact, severity-request paragraph as first body section, OOS-clause rebuttal templates (rate limiting on auth-flow endpoints…

elementalsouls/Claude-BugHunter · 171 tokens

mobile-pentest

Mobile app pentest for bug bounty (Android APK + iOS IPA) — runtime-first workflow: install app, proxy through Burp/mitmproxy, drive the UI, capture packets, then test the API exactly like a web target; escalate to decompile (apktool/jadx) and Frida/objection only when traffic is SSL-pinned, encrypted, or absent.…

Awarexone/Agentic-Bug-Hunter · 205 tokens

hunt-api-misconfig

Hunt API security misconfiguration — mass assignment, prototype pollution, HTTP verb tampering. Mass assignment: send {isadmin:true, role:admin, verified:true} on profile/account/reset endpoints — server blindly applies. JWT signature/crypto forging (alg:none, key confusion, kid/jku) is owned by hunt-jwt-crypto; this…

elementalsouls/Claude-BugHunter · 207 tokens

hunt-ato

Hunt account takeover taxonomy — 9 distinct paths to ATO, plus chains. Paths: (1) password reset flaws (host-header injection redirects token, predictable/numeric token, Referer leak, no-expiry/reuse), (2) email change without re-auth, (3) OAuth account-link CSRF, (4) MFA bypass (per hunt-mfa-bypass), (5) session…

elementalsouls/Claude-BugHunter · 241 tokens