Industry Newsprompt injectioncopilotvaronissecurity
Microsoft Fixes Copilot Reprompt Data Leak
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9.1
Microsoft patched a single-click prompt injection named 'Reprompt' in the consumer version of Copilot during the first Patch Tuesday of the year, after data security vendor Varonis reported the flaw. Reprompt could exfiltrate conversation history, file attachments, location, and user details by chaining attacker-controlled prompts via a ?q= parameter; users should avoid suspicious links and review prefilled prompts.
Scoring Rationale
High novelty and actionable patching elevate impact; scope limited to consumer Copilot sessions and lacks an assigned CVE.
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