6.1

CVE-2025-54353: fortinet fortisandbox Cross-site Scripting

CVSS: 6.1v3.1MediumAnalyzed
Published 09-12-2025Last modified 14-01-2026
Open JSON

Vulnerability summary

CVE-2025-54353 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in fortinet fortisandbox. EPSS estimates a 6.31% chance of exploitation in the next 30 days, higher than 93.5% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.1/10
010
Medium · v3.1 (NVD)
EPSS score
6.31%
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. 09-12-2025
    PublishedVulnerability first disclosed.
  2. 14-01-2026
    Last modifiedVulnerability information updated.

Description

An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.2, FortiSandbox 4.4.0 through 4.4.7, FortiSandbox 4.2 all versions, FortiSandbox 4.0 all versions may allow an attacker to perform an XSS attack via crafted HTTP requests.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

6.31%

Chance of exploitation in the next 30 days

Percentile

94%

Versus all other CVEs

30-day change

0.00 pp

From 6.31% on 19-09-2026

19-09-202619-10-2026
EPSS score
6.31%

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
  • fortisandbox≥ 4.2.1, ≤ 4.2.8 | ≥ 4.0.0, ≤ 4.0.6 | ≥ 4.2.0, ≤ 4.2.8 | ≥ 4.4.0, ≤ 4.4.7 | ≥ 5.0.0, ≤ 5.0.2

1 vendor · 1 product

References

1 links