Find what others miss.
Expert-led penetration testing for web applications, APIs and cloud infrastructure. Independent security testing that validates exploitable weaknesses, demonstrates real-world impact and gives your team clear steps to fix them.
- Web & API
- Mobile
- Cloud & Infrastructure
- AI Security
- Source Code
- Research
Offensive security, tailored to your systems.
From focused penetration tests to bespoke security research, we investigate the attack paths that matter to your business.
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01Web applications and APIs
Application Security
Identify vulnerabilities in authentication, authorization, business logic, session handling and application workflows. Validate how weaknesses can be chained into meaningful impact.
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02iOS and Android applications
Mobile Security
Assess client-side protections, local data storage, authentication, API interactions and platform-specific security controls.
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03Cloud environments, networks and systems
Cloud & Infrastructure
Assess exposed services, identity and access controls, configuration weaknesses, privilege boundaries and attack paths across infrastructure.
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04Prompt injection and AI application security
AI & LLM Security
Test LLM-powered applications, agent workflows, tool permissions, retrieval pipelines and trust boundaries for exploitable security weaknesses.
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05Manual and tool-assisted review
Source Code Review
Review nominated repositories for authorization flaws, injection paths, insecure data handling and logic errors, cross-checked against how the running application behaves.
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06Bespoke engagements and complex technical problems
Private Security Research
Investigate unusual attack surfaces, system-specific security questions and problems that fall outside conventional testing scopes.
Also available: authorized phishing and social engineering exercises, scoped and agreed in advance.
We test beyond the checklist.
Security testing is only useful when it reflects how systems can actually fail. Our engagements combine structured assessment methodology, hands-on offensive testing and targeted research to uncover weaknesses that automated checks alone may miss.
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01
Understand the system
We map the relevant attack surface, trust boundaries, roles and critical workflows.
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02
Investigate attack paths
We test assumptions, explore application logic and examine how individual weaknesses can combine into broader impact.
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03
Validate the findings
Every exploitable finding is verified by a senior researcher and documented with the evidence needed to understand and reproduce it.
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04
Support remediation
We deliver prioritized findings, practical remediation guidance and a technical debrief aligned with your team's needs.
Tooling and standards
We use purpose-built tooling and AI-assisted analysis to support our researchers, while keeping technical judgment and finding validation central to the engagement.
Testing is aligned with the OWASP Web Security Testing Guide, the OWASP API Security Top 10, MASVS / MASTG and PTES.
On one engagement, we surfaced within 24 hours issues that a prior three-week external penetration test had missed.
Who does the work
Every engagement is led hands-on by a senior researcher. The team's background includes:
- Consulting
- Leading international security consultancies, across financial services, big tech and critical infrastructure
- Product security
- In-house platform, mobile and AI/ML security at a global technology company
- Disclosure
- Coordinated CVE disclosures with major vendors and open-source projects
- Community
- Talks and tools presented at international security conferences, plus contributions to widely used open-source security software
Research that goes beyond the engagement.
We investigate security weaknesses in real systems, develop practical attack techniques and contribute to responsible vulnerability disclosure.
Explore selected research, technical write-ups and security advisories from Syntetisk.
4 coordinated disclosures·2 CVEs assigned·AWS, phpBB, Lima, Django
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Django
Stored XSS in Django's admin via an unvalidated URLField display path (CVE-2026-15920)
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Lima
Privilege escalation to root in Lima QEMU guests via a world-writable agent socket (CVE-2026-53657)
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phpBB
Blind POST SSRF in phpBB 4.0.0-alpha1 Web Push (CVD with phpBB)
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AWS
Empty-ciphertext panic in aws-encryption-provider (CVD with AWS)
Engagements built around your objectives.
Every system has a different attack surface. We define the scope, testing approach and deliverables around the risks you need to understand.
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Scoped Security Assessments
Focused penetration testing of applications, APIs, mobile products, cloud environments and infrastructure.
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Bespoke Research Engagements
Tailored technical investigations for unusual systems, emerging attack surfaces and questions that require deeper research.
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Ongoing Security Testing
Repeat assessments and targeted retesting to evaluate changes, validate fixes and keep critical systems under scrutiny.
What you receive
- 01Executive summary. Risk posture and key outcomes for a non-technical audience.
- 02Technical findings. Each with a proof-of-concept, supporting evidence and reproduction steps.
- 03Risk ratings. CVSS-based severity for every finding.
- 04Remediation guidance. Practical fixes, prioritized by severity.
Built for teams shipping complex systems.
Startups & product teams
Validate critical application flows, investigate security issues before release and understand which weaknesses create real exposure.
Enterprise security teams
Assess complex environments, investigate attack paths and engage specialist researchers for problems that require deeper technical analysis.
Whether you need a focused penetration test or a bespoke research engagement, we start with the system, the risks and the questions you need answered.
We reply within one business day and can typically start within five business days of signed authorization.
Discuss your requirementsFrequently asked questions.
01What types of systems do you assess?
We assess web applications, APIs, mobile applications, cloud environments, infrastructure, AI-powered applications and source code. We also undertake selected social engineering exercises and bespoke security research engagements.
02How do you define the scope of an engagement?
We discuss your objectives, relevant assets, access requirements, testing constraints and desired outcomes before proposing a scope tailored to your needs.
03What will we receive at the end of an engagement?
Deliverables are agreed during scoping and typically include an executive summary, documented findings with supporting technical evidence and reproduction steps, CVSS-based risk ratings and prioritized remediation guidance.
04Do you exploit the vulnerabilities you find?
Where the scope allows, we demonstrate impact with a working proof-of-concept. That is what separates a validated finding from a scanner result.
If you would rather we report potential issues without active exploitation, we agree that during scoping. We never act outside the agreed scope, and we never perform destructive or denial-of-service actions.
05How do you handle our data?
Engagement data is kept in per-engagement encrypted storage. Tokens, sessions and any sensitive data captured during testing are deleted after the contractual retention period, unless you ask us to retain them for retesting. We never sell, share or aggregate client data.
06Who owns the findings and reports?
Findings and reports are yours to keep, share internally and act on. Ownership of any custom tooling built during a research engagement is agreed during scoping. We never share your data or findings with other clients.
07Can you investigate a specific security concern?
Yes. Where the problem fits our capabilities, we can structure a focused assessment or a bespoke research engagement around a specific technical question.
08How do we get started?
Contact us with a short description of your system and the problem you want to investigate. We reply within one business day, discuss the requirements and determine the appropriate next step. Engagements can typically start within five business days of signed authorization.
Have a difficult security question?
Tell us what you're building, what concerns you and what you need to validate. We'll discuss the scope and determine whether we're the right team for the engagement.
Prefer email? Contact us directly at hello@syntetisk.tech.
We reply within one business day. Please don't include credentials or sensitive infrastructure details in your first message.