ChatGPT is manipulated by 13-word Reddit comments
cornell research finds a single 13-word snippet on reddit can poison ai search outputs, proving deep-research agents are vulnerable to easy content injection.
a study by cornell researchers found that ai agents frequently cite user-generated content from sites like reddit, wikipedia, and quora in nearly half of all queries, making them trivial to exploit. the team demonstrated that just 13 words in a single comment can force models like chatgpt to output promotional or scam content as fact. brands are already using 'ai-engine optimization' to flood these platforms, overwhelming volunteer moderators who cannot stop the manipulation. this vulnerability exists because agents prioritize lexical similarity over factual accuracy, allowing attackers to reverse-engineer queries and inject poisoned text.