What is Prompt Injection in Cybersecurity?
An attack against LLM-powered applications where malicious input overrides the system's intended instructions. Direct prompt injection embeds commands in user input, while indirect injection hides instructions in external data the model retrieves. Successful attacks can bypass safety filters, exfiltrate data, or make the model perform unauthorized actions.
Why Prompt Injection Matters for Your Cybersecurity Career
Prompt injection is the SQL injection of the AI era. Penetration testers now include LLM testing in their engagements. Security engineers building AI-powered features must implement input validation and output filtering to defend against this attack class. Understanding this vulnerability is becoming a baseline expectation.
Applied AI counterpart
The Applied AI glossary covers a parallel prompt engineering term used at the AI-system-design layer.
Read about Prompt Engineering in Applied AIWhich Cybersecurity Roles Use Prompt Injection?
Related Cybersecurity Terms
Citation index · auto-derived from course content
Where Prompt Injection is used across DecipherU
15 public surfaces on the platform reference this term in a meaningful way. Sorted by relevance.
Courses · 6
Lessons that teach this term as part of a structured curriculum.
"…rticulate the cybersecurity surface every AI engineer owns: prompt injection, data exfiltration, secret leakage, model abuse, supply cha…"
"…n cybersecurity-relevant terms Map the AI threat surface (prompt injection, data poisoning, model theft, adversarial examples) to fami…"
"…Identify the cybersecurity threats specific to AI products (prompt injection, data exfiltration, supply chain) and how to discuss them h…"
"…e second reason is that AI risk is in part a security risk. Prompt injection is an injection vulnerability. Training data poisoning is a…"
"…bersecurity considerations identified at the product layer (prompt injection exposure, data leakage exposure, audit trail requirement).…"
"Prompt Injection Defense"
Career role guides · 2
Cybersecurity careers where this term is part of the day-to-day vocabulary.
"…think about model quality; you bring the adversarial lens. Prompt injection, training-data poisoning, model extraction, jailbreaking, a…"
"…nce, retrieval pipelines, and the user-facing surface where prompt injection and abuse arrive. The role sits between traditional appsec…"
Related glossary entries · 7
Other glossary terms whose definition cites this one.
"…models and applications built on them from attacks such as prompt injection, jailbreaking, data exfiltration, and training data extract…"
"…te model outputs, data leakage through model responses, and prompt injection via injected content in retrieved documents."
"…nal security testing to include testing for hallucinations, prompt injection, content policy bypasses, and unintended behaviors. Teams u…"
"…and outputs (responses) in real time. LLM firewalls detect prompt injection attempts, block requests for sensitive data, prevent jailbr…"
"…rmful actions, credential theft from agent tool chains, and prompt injection that redirects agent behavior."
"…in security-critical decisions, and new attack vectors like prompt injection."
"…oning, rolling back to known-good model versions, analyzing prompt injection attacks, and reporting AI safety incidents to regulators wh…"
An attack against LLM-powered applications where malicious input overrides the system's intended instructions. Direct prompt injection embeds commands in user input, while indirect injection hides instructions in external data the model retrieves. Successful attacks can bypass safety filters, exfiltrate data, or make the model perform unauthorized actions.
Prompt injection is the SQL injection of the AI era. Penetration testers now include LLM testing in their engagements. Security engineers building AI-powered features must implement input validation and output filtering to defend against this attack class. Understanding this vulnerability is becoming a baseline expectation.
Cybersecurity professionals who work with Prompt Injection include Penetration Tester, Security Engineer, Security Architect. These roles apply Prompt Injection knowledge within the Emerging Technology Security domain.
Definitions are original explanations written for career development purposes. For authoritative technical definitions, refer to NIST, ISO, or the relevant standards body.
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