CVE Catalog

CVE-2025-25253

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.01%

3th percentile - higher than 3% of all known CVEs

Summary

CVE-2025-25253 describes an improper validation of certificate with host mismatch vulnerability in FortiProxy and FortiOS, which may allow an unauthenticated attacker in a man-in-the-middle position to intercept and tamper with connections to the ZTNA proxy.

Risk Assessment

The organization may be exposed to attacks that allow the interception of sensitive data and manipulation of communications, potentially leading to serious security breaches.

Recommendation

It is recommended to update FortiProxy and FortiOS to the latest versions that address this vulnerability and to implement additional security measures to protect against man-in-the-middle attacks.

Related vulnerabilities

Original NVD description (English source)

An Improper Validation of Certificate with Host Mismatch vulnerability [CWE-297] in FortiProxy version 7.6.1 and below, version 7.4.8 and below, 7.2 all versions, 7.0 all versions and FortiOS version 7.6.2 and below, version 7.4.8 and below, 7.2 all versions, 7.0 all versions ZTNA proxy may allow an unauthenticated attacker in a man-in-the middle position to intercept and tamper with connections to the ZTNA proxy

Vulnerability data from NVD (NIST) · CISA KEV · EPSS