Improper Certificate Validation in FortiProxy by Fortinet

CVE-2025-25253

What is CVE-2025-25253?

An improper validation of certificate with host mismatch vulnerability in FortiProxy and FortiOS could enable an unauthenticated attacker in a man-in-the-middle position to intercept and potentially alter connections to the Zero Trust Network Access (ZTNA) proxy. This flaw affects multiple versions of the FortiProxy and FortiOS products, leading to significant security risks that demand prompt attention to ensure secure network communications.

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