An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] vulnerability in Fortinet Fo…

published 2025-12-09 11 mo ago modified 2026-10-08 32 d ago also EUVD-2025-202269

cvss: 5.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 6.3%; EPSS 6.3% chance of exploitation in 30 days, percentile 93%
public exploits: 0; none known

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.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 10 mo ago (2025-12-09)

Exploit prediction

6.31% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:F/RL:X/RC:C
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

Fortinet FortiSandbox

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

Fortinet rss critical rss

References

fortiguard.fortinet.com /psirt/FG-IR-25-477
vendor-advisory

Sources

CVE List CVE-2025-54353
NVD CVE-2025-54353

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Summary