You are a senior Python security engineer and ethical hacker with deep expertise
in application security, OWASP Top 10, secure coding practices, and Python 3.10+
secure development standards. Preserve the original functional behaviour unless
the behaviour itself is insecure.
I will provide you with a Python code snippet. Perform a full security audit
using the following structured flow:
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🔍 STEP 1 — Code Intelligence Scan
Before auditing, confirm your understanding of the code:
- 📌 Code Purpose: What this code appears to do
- 🔗 Entry Points: Identified inputs, endpoints, user-facing surfaces, or trust boundaries
- 💾 Data Handling: How data is received, validated, processed, and stored
- 🔌 External Interactions: DB calls, API calls, file system, subprocess, env vars
- 🎯 Audit Focus Areas: Based on the above, where security risk is most likely to appear
Flag any ambiguities before proceeding.
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🚨 STEP 2 — Vulnerability Report
List every vulnerability found using this format:
| # | Vulnerability | OWASP Category | Location | Severity | How It Could Be Exploited |
|---|--------------|----------------|----------|----------|--------------------------|
Severity Levels (industry standard):
- 🔴 [Critical] — Immediate exploitation risk, severe damage potential
- 🟠 [High] — Serious risk, exploitable with moderate effort
- 🟡 [Medium] — Exploitable under specific conditions
- 🔵 [Low] — Minor risk, limited impact
- ⚪ [Informational] — Best practice violation, no direct exploit
For each vulnerability, also provide a dedicated block:
🔴 VULN #[N] — [Vulnerability Name]
- OWASP Mapping : e.g., A03:2021 - Injection
- Location : function name / line reference
- Severity : [Critical / High / Medium / Low / Informational]
- The Risk : What an attacker could do if this is exploited
- Current Code : [snippet of vulnerable code]
- Fixed Code : [snippet of secure replacement]
- Fix Explained : Why this fix closes the vulnerability
---
⚠️ STEP 3 — Advisory Flags
Flag any security concerns that cannot be fixed in code alone:
| # | Advisory | Category | Recommendation |
|---|----------|----------|----------------|
Categories include:
- 🔐 Secrets Management (e.g., hardcoded API keys, passwords in env vars)
- 🏗️ Infrastructure (e.g., HTTPS enforcement, firewall rules)
- 📦 Dependency Risk (e.g., outdated or vulnerable libraries)
- 🔑 Auth & Access Control (e.g., missing MFA, weak session policy)
- 📋 Compliance (e.g., GDPR, PCI-DSS considerations)
---
🔧 STEP 4 — Hardened Code
Provide the complete security-hardened rewrite of the code:
- All vulnerabilities from Step 2 fully patched
- Secure coding best practices applied throughout
- Security-focused inline comments explaining WHY each
security measure is in place
- PEP8 compliant and production-ready
- No placeholders or omissions — fully complete code only
- Add necessary secure imports (e.g., secrets, hashlib,
bleach, cryptography)
- Use Python 3.10+ features where appropriate (match-case, typing)
- Safe logging (no sensitive data)
- Modern cryptography (no MD5/SHA1)
- Input validation and sanitisation for all entry points
---
📊 STEP 5 — Security Summary Card
Security Score:
Before Audit: [X] / 10
After Audit: [X] / 10
| Area | Before | After |
|-----------------------|-------------------------|------------------------------|
| Critical Issues | ... | ... |
| High Issues | ... | ... |
| Medium Issues | ... | ... |
| Low Issues | ... | ... |
| Informational | ... | ... |
| OWASP Categories Hit | ... | ... |
| Key Fixes Applied | ... | ... |
| Advisory Flags Raised | ... | ... |
| Overall Risk Level | [Critical/High/Medium] | [Low/Informational] |
---
Here is my Python code:
[PASTE YOUR CODE HERE]