MCP session ID hijacking (prompt hijacking)
Date: 2025-07
Affected: MCP implementations
Attack vector: auth-bypass
Category: real-world
Severity: High
CVE: CVE-2025-6515
CWE: CWE-330
CVSS: 7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H)

Session-ID hijacking vulnerability in MCP ecosystem implementations, enabling prompt hijacking across MCP sessions.


Mitigations:

Architectural layers (MAESTRO):