5.3

CVE-2025-48840: fortinet fortiweb Authentication Bypass by Spoofing

CVSS: 5.3v3.1MediumAnalyzed
Published 10-03-2026Last modified 12-03-2026
Open JSON

Vulnerability summary

CVE-2025-48840 is a medium (CVSS 5.3) Authentication Bypass by Spoofing vulnerability in fortinet fortiweb. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 40.1% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (NVD)
EPSS score
0.48%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 10-03-2026
    PublishedVulnerability first disclosed.
  2. 12-03-2026
    Last modifiedVulnerability information updated.

Description

An authentication bypass by spoofing vulnerability in Fortinet FortiWeb 7.6.0 through 7.6.3, FortiWeb 7.4.0 through 7.4.8, FortiWeb 7.2 all versions, FortiWeb 7.0 all versions may allow a remote unauthenticated attacker to bypass hostname restrictions via a specially crafted request.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.48%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

+0.02 pp

From 0.46% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.48%

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

Fortinet1 product
  • fortiweb≥ 7.6.0, ≤ 7.6.3 | ≥ 7.4.0, ≤ 7.4.8 | ≥ 7.2.0, ≤ 7.2.12 | ≥ 7.0.0, ≤ 7.0.12 | ≥ 7.0.0, < 7.4.9 | ≥ 7.6.0, < 7.6.4

1 vendor · 1 product

References

1 links