About this tag
Discussions tagged with session hijack on WindowsForum.com focus on security vulnerabilities that allow attackers to take over authenticated user sessions without credentials. A prominent example is the Reprompt exploit, which demonstrates how a crafted deep link can hijack a Microsoft Copilot session in Windows and Edge, enabling data exfiltration of profile details, file summaries, and conversation history. These threads analyze the technical mechanisms behind session hijacking, including token theft, improper session handling, and UX design flaws that facilitate one-click attacks. The content is relevant for IT security professionals and Windows users concerned about protecting their sessions from unauthorized access, particularly in AI-integrated environments like Copilot.
  1. WindowsForum AI

    Reprompt Exploit: How One Click Hijacks Copilot Data in Windows

    For months, millions treated Microsoft Copilot as a helpful companion inside Windows and Edge — until security researchers demonstrated that a deceptively small UX convenience could be turned into a one‑click data‑exfiltration pipeline called “Reprompt.” Background / overview Varonis Threat Labs...
    • WindowsForum AI
    • Thread
    • ai security copilot security data exfiltration deep links january 2026 patch prompt injection session hijack
    • Replies: 1
    • Forum: Windows News