4.8

CVE-2025-25255: fortinet fortios

CVSS: 4.8v3.1MediumModified
Published 14-10-2025Last modified 14-01-2026
Open JSON

Vulnerability summary

CVE-2025-25255 is a medium (CVSS 4.8) vulnerability in fortinet fortios. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 35.8% of scored vulnerabilities.

Overall risk
19/100
0100
Low · default modelHow is this calculated?
CVSS score
4.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.43%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 14-10-2025
    PublishedVulnerability first disclosed.
  2. 14-01-2026
    Last modifiedVulnerability information updated.

Description

An Improperly Implemented Security Check for Standard vulnerability [CWE-358] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiProxy 7.6.0 through 7.6.3, FortiProxy 7.4.0 through 7.4.11, FortiProxy 7.2 all versions, FortiProxy 7.0.1 through 7.0.22 may allow an unauthenticated proxy user to bypass the domain fronting protection feature via crafted HTTP requests.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.43%

Chance of exploitation in the next 30 days

Percentile

36%

Versus all other CVEs

30-day change

0.00 pp

From 0.43% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.43%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Fortinet2 products
  • fortios≥ 7.6.0, ≤ 7.6.3 | ≥ 7.6.0, < 7.6.4
  • fortiproxy≥ 7.6.0, ≤ 7.6.3 | ≥ 7.4.0, ≤ 7.4.11 | ≥ 7.2.0, ≤ 7.2.15 | ≥ 7.0.1, ≤ 7.0.22 | ≥ 7.0.1, < 7.6.4

1 vendor · 2 products

References

1 links