Researchers discovered a vulnerability in Microsoft Copilot Enterprise that allowed attackers to exfiltrate sensitive data, including user passwords, without explicit user confirmation. The exploit was uncovered by Varonis researchers who, through a series of questions, prompted Copilot to reveal an undocumented parameter, '?autorun=1', which bypassed the need for user consent when combined with a known parameter. Microsoft has since mitigated the vulnerability, first in February and with more comprehensive fixes recently, by altering how the chatbot handles input from URLs. AI
IMPACT Highlights potential security risks in AI assistants and the need for robust guardrails against prompt injection.
RANK_REASON Discovery of a vulnerability in a widely used AI product.
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