CVE-2025-25253

Description

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

CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-297 CWE-297

Affected Products

Vendor	Product	Versions
fortinet	fortiproxy	7.0.0 — 7.4.9
fortinet	fortiproxy	7.6.0 — 7.6.2
fortinet	fortios	7.0.0 — 7.4.9
fortinet	fortios	7.6.0 — 7.6.3

References

Advisories & Patches

https://fortiguard.fortinet.com/psirt/FG-IR-24-457

Frequently Asked Questions

What is CVE-2025-25253? +

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 It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-25253? +

CVE-2025-25253 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-25253? +

CVE-2025-25253 affects products from fortinet, specifically: fortios, fortiproxy. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-25253? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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