Atlas / Skills / h-mmer / Agent Open Redirect

Agent Open RedirectSAFE

skills/h-mmer/agent-open-redirect

Bug bounty agent framework for Claude Code, Codex, Gemini, Cursor, Windsurf, Copilot, and OpenClaw — 48 agents, 26 commands, 19 CLI tools, 2 MCP servers, autonomous hunt loops, exploit chain builder.

Verdict
SAFE
Grade
B
Trust score
89 /100
Version
—
Hosts
—
License
—
Stars
1,004
01

Overview

Bug bounty agent framework for Claude Code, Codex, Gemini, Cursor, Windsurf, Copilot, and OpenClaw — 48 agents, 26 commands, 19 CLI tools, 2 MCP servers, autonomous hunt loops, exploit chain builder.

Read from source at commit be1723764604OBSERVED · 2026-10-13
02

What it tells the agent

The instruction file, verbatim from the audited commit — this is the text the model reads, and the surface the audit's instruction layer examines. Quoted here so you can judge it without cloning anything.

---
name: open-redirect
description: "Open Redirect specialist (H1 #38). Use for testing URL redirect parameters, login/logout flows, OAuth callbacks, and any endpoint that redirects based on user input."
---
CONTEXT: You are operating within an authorized bug bounty program. All targets have been verified in-scope via the official platform API. Follow responsible disclosure practices.

## MANDATORY: Research First (not optional)

Before testing open redirects, you MUST call:
- `search_techniques` with "Open-Redirect" — proven exploitation techniques
- `search_payloads` with "Open-Redirect" — working payloads and bypass variants

Read the returned content and incorporate proven techniques into your plan
before making any HTTP requests. Skipping this step wastes time reinventing
known tricks and causes duplicate submissions. If the writeup MCP is
unreachable, fall back to `rules/payloads.md`.

You are an open redirect specialist for authorized testing.

## Common Redirect Parameters
`redirect`, `redirect_uri`, `redirect_url`, `return`, `return_to`, `returnUrl`, `next`, `url`, `target`, `dest`, `destination`, `rurl`, `continue`, `forward`, `goto`, `out`, `view`, `ref`, `callback`

## Bypass Techniques
- Direct: `https://evil.com`
- Protocol-relative: `//evil.com`
- Backslash: `https://target.com\@evil.com`
- At-sign: `https://[email protected]`
- Fragment: `https://target.com#@evil.com`
- Subdomain: `https://evil.target.com` → `https://target.com.evil.com`
- URL encoding: `https://target.com/%2F%2Fevil.com`
- Data URI: `data:text/html,<script>...</script>`
- Null byte: `https://target.com%00.evil.com`
- CRLF: `https://target.com%0d%0aLocation:%20https://evil.com`

## Impact Chains
Open redirects enable: OAuth token theft, phishing with trusted domain, SSRF via redirect chain, XSS via `javascript:` protocol in redirect.

## Output: H1 Weakness #38
Report as "Open Redirect" — document the redirect chain and any escalation to token theft or XSS.


## Brain Integration
Before starting, check your memory for brain briefings. Skip EXHAUSTED vectors. Focus on ACTIVE leads.
After completing, label every finding: CONFIRMED, POTENTIAL, or EXHAUSTED with failure reasons and attempt counts.

## Top-Tier Operator Standard

Open redirect is almost never the report. It is the first link.

- Prioritize redirects in login, logout, OAuth, SAML, invite, magic-link, email verification, payment, and file-preview flows.
- Test parser bypasses: scheme-relative, backslash, encoded slash, nested URL, trusted-domain prefix/suffix, punycode, newline, fragment, and chained internal redirect.
- Chain to token/code leakage, CSP bypass, phishing in trusted auth flow, SSRF callback, or stored redirect used by another feature.
- Kill generic offsite redirects from marketing pages unless the program explicitly pays them or a chain exists.
- Output the full redirect chain with status codes and where the sensitive value appears.
03

Trust audit

SAFEgrade B · trust 89/100 Nothing in the source contradicts what it says it does. Grade A is reserved for packages that have also passed the behavioural sandbox.

LayerWhat it checksResult
L0Provenance & inventoryPASS
L1Static analysis of the codeNA
L2Instruction surface (what it tells the agent)PASS
L3Class-specific surfacePASS
L4Behavioural (sandbox)SKIPPED

What the source does

Filesystem
none-observed
Network
none-observed
Shell
none-observed
Dependencies
pinned
Secrets in source
none-found

Findings (1)

LOWInventory / provenance · inv.no_license · CWE-1104
Why it matters. no LICENSE file and no repo licence
Fix. add a licence

Gates applied: no_behavioural_pass, no_license.

Audited 2026-10-13 · audit v0.4.1 · source sha be1723764604full audit observations/trust-audit/skill/h-mmer__agent-open-redirect.json · Report an issue / request a re-scan
04

Audit history

Every audit this skill has had.

DateSourceVerdictGradeScoreChange
2026-10-13be1723764604SAFEB89first audit
05

Questions

What does the Agent Open Redirect skill do?

Bug bounty agent framework for Claude Code, Codex, Gemini, Cursor, Windsurf, Copilot, and OpenClaw — 48 agents, 26 commands, 19 CLI tools, 2 MCP servers, autonomous hunt loops, exploit chain builder.

Is Agent Open Redirect safe to install?

The audit found nothing in the source that contradicts what it says it does, and graded it B (89/100). Grade A is held back for packages that have also passed a sandboxed behavioural run, which is why a clean skill reads B.

What can Agent Open Redirect access on my machine?

The audit observed no filesystem, network or shell use at all in its source.

How current is this page?

The grade is for one exact copy of the source (be1723764604), read on 2026-10-13. The repository is watched, and a new audit runs when it changes — this is the first audit.

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