Core Viewpoint - ChatGPT has a significant security vulnerability known as "zero-click attack," allowing attackers to steal sensitive data without user interaction, including API keys [1][3]. Attack Chain Formation - The vulnerability arises when ChatGPT connects to third-party applications, where attackers can inject malicious prompts into documents uploaded by users [6][10]. - Attackers can embed invisible payloads in documents, prompting ChatGPT to inadvertently send sensitive information to their servers [10][12]. Invasion Process - Users upload documents to ChatGPT for analysis, which can lead to the execution of malicious commands embedded within those documents [7][10]. Data Exfiltration Method - Attackers can embed sensitive data, such as API keys, into image URLs, which are rendered by ChatGPT, allowing for immediate data transmission to the attackers' servers without user interaction [13][18]. OpenAI's Mitigation Measures - OpenAI has implemented measures to check URLs for safety before rendering images, aiming to prevent data leaks [19][20]. - However, attackers have found ways to bypass these measures by using trusted services like Azure Blob for data exfiltration [21][22]. Broader Security Implications - The vulnerability poses a significant risk to enterprises, as malicious insiders could easily exploit it to access and contaminate sensitive documents [12][25]. - Traditional security training may not effectively mitigate this risk, as the attack does not require user interaction [25][26]. Expert Recommendations - Experts suggest implementing strict access controls for AI connectors, deploying monitoring solutions tailored for AI activities, and educating users about the risks of uploading unknown documents [25][27].