What is CVE-2025-25253?

CVE-2025-25253 is a medium-severity vulnerability in Fortinet Fortios, classified under Improper Validation of Certificate with Host Mismatch. CVSS score: 6.8/10. Published 2025-10-14.

How severe is CVE-2025-25253?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Vulnerability in Fortinet Fortios

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 belo…

EPSS: 0.000 (2.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R.

Affected products

Fortinet Fortios — versions 7.6.0, 7.4.0, 7.2.0
Fortinet Fortipam — versions 1.4.1
Fortinet Fortiproxy — versions 7.6.0, 7.4.0, 7.2.0

Weakness classification (CWE)

CWE-297 — Improper Validation of Certificate with Host Mismatch

References

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

Frequently asked questions

What is CVE-2025-25253?: CVE-2025-25253 is a medium-severity vulnerability in Fortinet Fortios, classified under Improper Validation of Certificate with Host Mismatch. CVSS score: 6.8/10. Published 2025-10-14.
How severe is CVE-2025-25253?: Medium severity. CVSS v3 base score is 6.8 out of 10.