ssrf-attacker

ssrf-attacker is an agent for Claude Code from morodomi/redteam-skills. It costs 33 tokens per session (1,102 once invoked), scanned C, original, MIT.

A code-analysis agent that looks for server-side request forgery (SSRF), a flaw where user-controlled addresses make a server send unintended requests.

In plain words
What is it for?
Reviewing PHP, Python, Node.js, and Java code for direct, hidden, or partly user-controlled URL requests.
Why use it?
It helps identify code patterns that may let attackers reach internal services or cloud metadata endpoints through your application.

Agent for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the redteam-core plugin — 4 skills, 18 agents shipped together

Good fit Reviewing PHP, Python, Node.js, and Java code for direct, hidden, or partly user-controlled URL requests.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/morodomi/redteam-skills/ssrf-attacker
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.

Clone the repo
git clone --depth 1 https://github.com/morodomi/redteam-skills

Made for: Claude Code.

Or install redteam-core, the plugin that ships this one along with the rest of its 4 skills, 18 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 ssrf-attacker

README.md
[![agentmods](https://agentmods.dev/badge/agents/morodomi/redteam-skills/ssrf-attacker.svg)](https://agentmods.dev/agents/morodomi/redteam-skills/ssrf-attacker)
Your own site
<a href="https://agentmods.dev/agents/morodomi/redteam-skills/ssrf-attacker"><img src="https://agentmods.dev/badge/agents/morodomi/redteam-skills/ssrf-attacker.svg" alt="Measured on agentmods" height="20"></a>
Per session 33 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,102 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 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 $0.00033 $0.01102
Opus 5 $0.00016 $0.00551
Sonnet 5 $0.00007 $0.00220
Haiku 4.5 $0.00003 $0.00110

Measured 7d ago against content hash 8f235d1d10b7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade C, and why

ssrf-attacker scanned grade C 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 7d 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 endpointhighServer-side request forgery

One request to 169.254.169.254 can return temporary IAM credentials.

| critical | Cloud metadata service access (169.254.169.254) |

Makes network callslowCapability

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

- 'urllib\.request\.urlopen\s*\(\s*request\.'
plugins/redteam-core/agents/ssrf-attacker.md · 128 lines

How it starts

The opening of the file, as written. The whole thing — 128 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SSRF Attacker

Server-Side Request Forgery (SSRF) 脆弱性を静的解析で検出するエージェント。

Detection Targets

Type Description Pattern
ssrf ユーザー入力URLへのリクエスト Direct URL from user input
blind-ssrf レスポンス非表示のSSRF Response not returned to user
partial-ssrf URL一部のみユーザー制御 Path/query controlled by user

Dangerous Patterns

patterns:
  # PHP - SSRF
  - 'file_get_contents\s*\(\s*\$_(GET|POST|REQUEST)'
  - 'curl_setopt\s*\([^,]+,\s*CURLOPT_URL\s*,\s*\$'
  - 'fopen\s*\(\s*\$_(GET|POST|REQUEST)'

  # Python - SSRF
  - 'requests\.(get|post|put|delete|head)\s*\(\s*request\.'
  - 'urllib\.request\.urlopen\s*\(\s*request\.'
  - 'httpx\.(get|post)\s*\(\s*request\.'

  # Node.js - SSRF
  - 'axios\.(get|post)\s*\(\s*req\.(query|body|params)'
  - 'fetch\s*\(\s*req\.(query|body|params)'
  - 'http\.request\s*\(\s*req\.'
  - 'got\s*\(\s*req\.(query|body|params)'

  # Java - SSRF
  - 'new\s+URL\s*\(\s*request\.getParameter'
  - 'HttpURLConnection.*request\.getParameter'
  - 'RestTemplate.*request\.getParameter'

  # Cloud Metadata Services
  - '169\.254\.169\.254'
  - 'metadata\.google\.internal'
  - 'metadata\.azure\.com'
  - 'X-aws-ec2-metadata-token'

  # Dangerous Protocol Schemes
  - '\b(file|gopher|dict|ldap|tftp)://'
  - 'localhost|127\.0\.0\.1|0\.0\.0\.0|::1'

Output Format

{
  "metadata": {
    "scan_id": "<uuid>",
    "scanned_at": "<timestamp>",
    "agent": "ssrf-attacker"
  },
  "vulnerabilities": [
    {
      "id": "SSRF-001",
      "type": "ssrf",
      "vulnerability_class": "ssrf",
      "cwe_id": "CWE-918",
      "severity": "critical",
      "file": "app/Http/Controllers/WebhookController.php",
      "line": 45,
      "code": "file_get_contents($_GET['callback_url'])",
      "description": "User-controlled URL passed to HTTP request function",
      "remediation": "Validate URL against allowlist of domains/schemes"
    }
  ],
  "summary": {
    "total": 1,
    "critical": 1,
    "high": 0,
    "medium": 0,
    "low": 0
  }
}

Read the full file on GitHub · 128 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. 7d ago First seen · 128 lines · 33 tokens per session scan C 8f235d1d10b7

Subscribe to this mod's changes

ssrf-attacker is an agent published in the GitHub repository morodomi/redteam-skills (2 stars, last pushed 6mo ago), licensed MIT. It adds 33 tokens to every session and 1,102 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C 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 2026-08-31.

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