Offensive Security for SaaS & MVPs

Close the gaps
before someone exploits them

Penetration testing for SaaS, web apps, and MVPs. I find authorization flaws, business logic gaps, and access control holes — a data leak triggers a GDPR fine, which sends investors running.

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Risk Detected

Broken Access Control — #1 OWASP threat

Risk Detected

Authentication Bypass in API endpoint

root@redwulf:~

root@redwulf:~# ./run_scan.sh --target=all --depth=deep

[*] target acquired

[+] mapping attack surface...

[!] 3 critical attack surfaces identified

root@redwulf:~#

OWASP Top 10Business Logic FlawsAuth BypassIDOR / BOLASSTISSRFJWT AttacksGraphQL SecurityLLM Prompt InjectionRace ConditionsAPI SecuritySession ManagementCSRFSQL InjectionXSSFirebase SecuritySupabase SecurityAccess ControlTenant IsolationFile Upload AbuseOWASP Top 10Business Logic FlawsAuth BypassIDOR / BOLASSTISSRFJWT AttacksGraphQL SecurityLLM Prompt InjectionRace ConditionsAPI SecuritySession ManagementCSRFSQL InjectionXSSFirebase SecuritySupabase SecurityAccess ControlTenant IsolationFile Upload Abuse

Applications Tested

Vulnerabilities Found

Years in Code

// Testing Scope

Web Application Security

Full-scope black-box testing. Auth, authorization, session management, API security, business logic. One misconfigured permission is all it takes for Customer A to see Customer B's data.

MVP & SaaS Penetration Testing

Launching next week? Fast, focused pentests for early-stage products. One critical vulnerability discovered after launch can destroy user trust overnight.

API Security Testing

REST, GraphQL, WebSocket — every endpoint is a potential target. I find broken object-level authorization, mass assignment, injection, and rate-limit bypasses.

AI-Generated Code Audits

Vibe-coded apps often ship without auth checks and with IDOR holes everywhere. I manually audit AI-built architectures to catch what scanners miss.

LLM Integration Security

Your AI wrapper can leak system prompts, expose training data, or execute unauthorized commands. I test against real prompt-injection and data-exfiltration scenarios.

Infrastructure Resilience Testing

Rate-limit bypasses, race conditions, failover gaps, auto-scaling weaknesses. I stress-test whether your infra holds up under load or targeted abuse — not just under ideal conditions.

Cloud Security Review

Open S3 buckets, overprivileged IAM roles, exposed security groups. I audit your AWS, GCP, or Azure infra for the misconfigurations attackers scan for.

Source Code Review

Manual analysis focused on auth flows, sensitive data paths, and business logic. I find the race conditions and IDORs that every SAST tool overlooks.

No-Code / BaaS Configuration Review

Firebase rules written by a non-technical team are a data breach waiting to happen. I review Supabase, Firebase, and no-code stacks.

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// How Engagements Run

Every test starts with understanding your product, users, and critical flows. Then I combine automation with targeted manual testing to find what matters.

Scoping & Threat Model

We define scope, user roles, and where the highest-value attack paths are.

Deep Testing

Advanced scanners + custom automation + focused manual verification of auth, authorization, tenant isolation, and business logic.

Safe Exploitation

Findings validated to prove impact without breaking data, production, or operations.

Report & Retest

Clear report with severity, evidence, attack path, and practical fixes. Retest included.

Typical test: 5–10 business days.

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// Sample Report

Sample Report

Every engagement ends with a detailed report — non-technical summary for business stakeholders, technical findings with CVSS scores, step-by-step reproduction, and concrete fixes. No fluff, no filler.

See Full Report Example

Penetration Test Report

SaaS Platform — Confidential

Broken Access Control — Admin Panel CRITICAL

JWT Token Manipulation — Privilege Escalation HIGH

Stored XSS in User Profile HIGH

// Case Studies

Real security incidents dissected. How they happened, what went wrong, and what you can learn from them — no jargon, just facts.

SQL Injection

MOVEit Transfer — Zero-Day SQL Injection, Mass Data Theft

A zero-day SQL injection in Progress MOVEit Transfer (CVE-2023-34362) was exploited by the Cl0p ransomware group. 2,700+ organizations and 95 million individuals affected.

Log4Shell — The Internet's Biggest RCE

A single JNDI lookup in Log4j 2.x gave attackers unauthenticated RCE on systems worldwide. CVSS 10.0. One of the most critical vulnerabilities ever disclosed.

SolarWinds — The Supply Chain Attack That Broke Fortune 500

Attackers breached SolarWinds Orion's build system and injected the SUNBURST backdoor into official software updates. 18,000 organizations downloaded the malicious update.

All Case Studies

// About

Adrian "Wulf" Weclawski

Offensive Security Consultant

I've worked with web applications for over 8 years — starting on the building side as a full-stack developer, now on the breaking side in offensive security. Every REDWULF engagement is run by me personally, from scoping through to the final report.

SaaS & Web App Security AI/LLM Security Testing Black-Box Penetration Testing

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// Frequently Asked Questions

Do you need source code access?

It helps, but it's not required. I can work black-box — like a real attacker with no credentials or documentation. If you share source code, I can go deeper and faster, especially on business logic and auth flows.

Do you test on production?

Yes — I just need to know upfront. Production testing is common and I adjust my techniques: no destructive payloads, no data corruption, no downtime. If you have a staging environment I'll use that for riskier checks.

How long does a test take?

Most engagements take 5–10 business days.

What's in the report?

One comprehensive PDF report. It includes an executive summary with a severity overview table, the scope and methodology used, detailed descriptions of every finding — each with a CVSS score, reproduction steps, technical details, proof of concept, business impact analysis, and concrete remediation steps. Also included: a CVSS v3.1 risk matrix and a conclusion with a prioritized action list — immediate, short-term, and ongoing.

Do you offer retesting?

Yes. After your team fixes the reported vulnerabilities, I retest to confirm the fixes are effective. Retesting is included in every engagement.

What tech stacks do you test?

React, Next.js, Vue, Angular, Node.js, Python/Django/Flask, Ruby on Rails, PHP/Laravel, Java/Spring, Go, Supabase, Firebase, AWS, and more. The stack doesn't matter — the vulnerabilities do.

Do I need a PGP key to work with you?

No. I provide a PGP key for encrypted communication if you need it — mostly relevant for enterprises handling sensitive data. For most SaaS and MVP engagements, standard email is fine.

Can you test AI-generated code?

Of course. AI-generated code often has systemic weaknesses — missing auth checks, predictable patterns, and overlooked edge cases. I specialize in auditing these codebases and catching gaps that scanners skip over.

// Contact

Ready to find out if your product can survive a real attack?

I usually reply within 24h. Initial scope and estimate — no strings attached.

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Close the gaps before someone exploits them