WorkNest Secure
LLM Security Testing
Deploy an LLM security assessment[2.1][3.1] for a structured, human-led review of applications using large language models (LLMs).[
LLM security assessments future-proof your AI needs
LLM security assessments future-proof your AI needs
LLM security assessments future-proof your AI needs
As the use of large language models grows, so do the vulnerabilities they pose to organizations of every size, in every industry.
With tailored US Penetration Testing services, our LLM security assessment is designed for organizations that have their own proprietary model or use a third-party plug-in, to identify any weaknesses caused by these before attackers do.
As the use of large language models grows, so do the vulnerabilities they pose to organizations of every size, in every industry.
With tailored US Penetration Testing services, our LLM security assessment is designed for organizations that have their own proprietary model or use a third-party plug-in, to identify any weaknesses caused by these before attackers do.
Our LLM Penetration Testing methodology
We ensure testing has depth and breadth by aligning with recognised methodologies such as CREST, OSSTMM, OWASP, and NIST.
This ensures a structured, consistent approach grounded in cybersecurity best practices and real-world threat intelligence.
We follow a clear seven-step process designed to deliver rigorous testing, meaningful insight, and practical remediation guidance at every stage.
We define the target architecture and tailor the engagement around your technology stack, risk appetite, and compliance requirements.
We identify the underlying model, middleware frameworks, retrieval pipelines, and tool integrations, probing for system prompt leakage and charting every instruction source the model trusts
We attempt to override your model's instructions through direct and indirect injection techniques, including multi-turn escalation, encoding bypasses, and hidden payloads in content your AI may consume.
We test whether your retrieval pipeline can be poisoned, whether access controls hold across users and tenants, and whether injected content can manipulate model reasoning.
We enumerate connected tools and test for excessive permissions, missing confirmation gates, and whether prompt injection can chain into real-world actions.
We test for cross-site scripting, SQL injection through AI-generated queries, and data exfiltration via tool calls and out-of-band channels.
Findings are mapped to the OWASP LLM Top 10, clearly attributed to either the model layer or the application layer, severity-rated. It is accompanied by concrete remediation guidance, a debrief call, and post-engagement support.
Why should you conduct LLM Pen Test?
Why should you conduct LLM Pen Test?
Why should you conduct LLM Pen Test?
AI systems are developing at pace, so it is essential to test their security to protect your organisations data and information.
Expose insecure functionality in your LLM
Identify how your LLMs can be exploited in practice
Ensure your LLM applications are secure, compliant, and ready for production
Gain full visibility into your LLM risks, from data exposure to model manipulation
AI systems are developing at pace, so it is essential to test their security to protect your organisations data and information.
Expose insecure functionality in your LLM
Identify how your LLMs can be exploited in practice
Ensure your LLM applications are secure, compliant, and ready for production
Gain full visibility into your LLM risks, from data exposure to model manipulation
What is LLM Penetration Testing?
What is LLM Penetration Testing?
What is LLM Penetration Testing?
LLM Penetration Testing identifies weaknesses in large language model applications, uncovering how attackers could exploit vulnerabilities such as prompt injection, data leakage, or misuse.
It is designed for any organization developing in-house models, integrating third-party LLM tools, or building and deploying plugins. Precision testing helps ensure AI systems are secure, resilient, and ready for real-world use.
Uncover and remediate hidden vulnerabilities to improve your organisation’s resilience.
Our Penetration Testing services cover a wide range of endpoint categories, including App, Network, Cloud, Web, and API. We can deliver the Penetration Test you need to get the results you want.
Identify vulnerabilities or misconfigurations in Android, iOS, and cross-platform apps.
Uncover misconfigurations, privilege gaps, and architectural weaknesses before attackers do.
Secure APIs against authentication and data risks.
Evaluate cloud infrastructure for misconfigurations and vulnerabilities.
