---
name: perseus-audit-e60dbfb348c0
description: Use when analyzing components for vulnerabilities (Phase 2 - Parallel Analysis)
---

# Perseus Audit (Phase 2)

## Overview

This skill executes the **Vulnerability Analysis Phase** of the Perseus framework. It performs deep-dive white-box analysis on the components identified during the Scan phase.

**Goal:** Prove the *potential* for exploitation by finding source-to-sink paths lacking proper defense.

**Methodology:**
1.  **Launch 5 Agents in Parallel:** Injection, XSS, Auth, Authz, SSRF.
2.  **Negative Analysis Loop:** Trace Source -> Sanitizers -> Sink -> Verdict.
3.  **Exploit Queue:** Generate actionable vulnerabilities for verification.

## Confidence Scoring (Required)

Assign confidence to every finding:

| Confidence | Criteria |
|------------|----------|
| High | Direct source-to-sink path with clear missing defense and reproducible trigger |
| Medium | Strong path evidence, but one assumption (runtime config/auth state) remains |
| Low | Pattern match only; data flow or trigger path is incomplete |

Prioritize exploit queue in this order:
1. High + Critical/High severity
2. Medium + Critical/High severity
3. Remaining findings

## Execution Instructions

Launch these 5 agents simultaneously using a single message with multiple `Task` tool calls:

1.  **Injection Analyst:**
    *   "Trace untrusted input to SQL/Command sinks. Verify if sanitization matches sink context. Flag string concatenation in queries."
2.  **XSS Specialist:**
    *   "Trace input to browser sinks (`innerHTML`, `eval`). Verify context-aware escaping. Flag raw HTML rendering."
3.  **Auth Specialist:**
    *   "Analyze login/session logic. Check for bypasses, weak tokens, and missing MFA. Verify `state`/`nonce` in OAuth."
4.  **Authz Specialist:**
    *   "Analyze permission checks (RBAC/ABAC). Check for IDOR and Privilege Escalation. Verify every protected route has a guard."
5.  **SSRF Specialist:**
    *   "Trace input to outbound request sinks. Verify URL validation and allowlists. Check for local network access."

## Analysis Methodology (The "Negative Analysis" Loop)

For each agent, enforce this loop:

1.  **Trace Source:** Identify where untrusted data enters (from Scan phase).
2.  **Trace Flow:** Follow variables through functions, middleware, and transforms.
3.  **Identify Sink:** Where does the data end up? (DB, Screen, Log, Shell).
4.  **Verify Defense:**
    *   *Is there validation?* (e.g., `zod.parse`)
    *   *Is there sanitization?* (e.g., `escapeHtml`)
    *   *Is it parameterized?* (e.g., Prepared Statements)
5.  **Verdict:**
    *   **VULNERABLE:** Path exists + Defense missing/mismatched. -> **Add to Exploit Queue**
    *   **SAFE:** Defense is robust. -> **Document as Secure**

## Output Requirements

Each agent must produce a specialized report in `deliverables/`:
*   `injection_analysis.md`
*   `xss_analysis.md`
*   `auth_analysis.md`
*   `authz_analysis.md`
*   `ssrf_analysis.md`

For each finding include:
*   **Finding ID**
*   **Source -> Sink Path**
*   **Missing or Mismatched Defense**
*   **Preconditions**
*   **Confidence:** `High` | `Medium` | `Low`
*   **Exploit Candidate:** `Yes` | `No` (and reason)

**Next Step:** Proceed to `perseus:exploit` to verify findings with Proof-of-Concept.


---
Source attribution: kaivyy
Original project: https://github.com/kaivyy/perseus/blob/f9653319ae2c68945cfb890c95736cdcac93e92f/skills/perseus/audit/SKILL.md
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Mega AI Hub.

## Upstream license notice

MIT License

Copyright (c) 2026 Kaivy

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Mega AI Hub resource metadata

Creator / publisher: kaivyy
Original project: https://github.com/kaivyy/perseus/blob/f9653319ae2c68945cfb890c95736cdcac93e92f/skills/perseus/audit/SKILL.md
Attribution basis: Source repository record

Fields of work: Development & Engineering
Roles: DevOps / SRE, QA / Test Engineer, Security Engineer
Specialties: Testing
Tools: Perseus
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: 230342715b13558185081d16a1d95c8fb78e4b63861bad1c482115914af78db0