Prompt Injection in Automated R\'esum\'e Screening with Large Language Models: Single and Multi-Injection Settings (opens in new tab)

Large language models (LLMs) are increasingly used to screen and rank job applicants, creating incentives for candidates to strategically manipulate algorithmic hiring systems. We study prompt injection in automated r\'esum\'e screening, defined as subtle self-promotional text that introduces no new qualifications but is designed to influence LLM evaluations. Using controlled experiments, we show that prompt injection reliably improves applicant...