All news with #session hijacking tag

⚠️ Security researchers at Varonis disclosed a vulnerability, dubbed Reprompt, that could let attackers hijack a user's Copilot Personal session by embedding malicious instructions in a URL. The attack leverages the 'q' URL parameter to inject prompts that execute when the page loads, then uses chained server-side follow-up requests to maintain access and exfiltrate data after a single click. Varonis reported the issue to Microsoft on August 31, and Microsoft issued a fix on the January 2026 Patch Tuesday; users should apply the latest Windows update promptly.

🔒 CISA reported several vulnerabilities in the YoSmart YoLink ecosystem impacting the cloud server, Smart Hub, and mobile application. Exploitation could let attackers remotely control other users' devices, intercept unencrypted MQTT traffic, and hijack sessions. YoSmart pushed server-side fixes and will deliver a hub firmware update over-the-air; users should update the YoLink mobile app to 1.40.45 or later.

⚠ Security researchers at Cato Networks disclosed CVE-2025-64496, a vulnerability in Open WebUI that lets external model servers inject JavaScript via Server-Sent Events (SSE) when the Direct Connections feature is enabled. An attacker controlling a malicious model endpoint can exfiltrate JSON Web Tokens (JWTs) from the browser, enabling account takeover and access to documents, chats, and embedded API keys. If the compromised account has Workspace Tools privileges, the session token can be used to execute authenticated Python code on the backend, leading to remote code execution. The flaw affects versions up to 0.6.34 and is fixed in 0.6.35; organizations are urged to update and implement HttpOnly cookies, strict CSPs, and ban dynamic code evaluation.

🔒 Adobe issued an emergency out-of-band patch for a critical vulnerability in Magento Open Source and Adobe Commerce, tracked as CVE-2025-54236 and dubbed SessionReaper. The flaw permits unauthenticated attackers to hijack user accounts and, when file-based session storage is used, can enable remote code execution. Adobe notified Commerce customers on Sept. 4 but Magento Open Source users may not have received the same advance warning. Organizations operating Magento sites should apply the patch immediately.

🔒 As enterprises shift more critical work to the browser, adversary Scattered Spider (UNC3944) targets live browser data—saved credentials, calendars, and session tokens—to achieve account takeover and persistent access. The article highlights techniques like Browser-in-the-Browser overlays, JavaScript injection, malicious extensions, and token theft that evade conventional EDR. It recommends elevating browser-native controls: runtime JavaScript protection, session-token binding, extension governance, API restrictions, and integrated browser telemetry so CISOs treat browser security as a primary defense layer.