DeepSeek AI: From Prompt Injection To Account Takeover

A researcher discovered that DeepSeek-R1-Lite, a new AI reasoning model, is vulnerable to prompt injection (tricking an AI by hiding instructions in its input) combined with XSS (cross-site scripting, where malicious code runs in a user's browser). By uploading a specially crafted document with base64-encoded malicious code, an attacker could trick the AI into executing JavaScript that steals a user's session token (a credential stored in browser memory that proves who you are), leading to complete account takeover.