SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2017-3131

A Cross-Site Scripting vulnerability in Fortinet FortiOS versions 5.4.0 through 5.4.4 and 5.6.0 allows attackers to execute unauthorized code or commands via the filter input in "Applications" under FortiView.

EXPLOIT ✓MEDIUM 5.4EPSS 7.68%

Does this matter?

A public exploit is published in Exploit-DB (verified), so the technical barrier is gone even though the severity is medium and EPSS is 7.7%. Treat it as high on anything reachable from the internet.

Description

A Cross-Site Scripting vulnerability in Fortinet FortiOS versions 5.4.0 through 5.4.4 and 5.6.0 allows attackers to execute unauthorized code or commands via the filter input in "Applications" under FortiView.

CVSS 3.0
5.4 MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
EPSS
7.68% probability · 95th percentile
Public exploits
1 in Exploit-DB · verified · first 28 July 2017
CISA KEV
Not listed
Weakness
CWE-79
Affected
fortinet/fortios
Source
psirt@fortinet.com
EPSS trend
0%5%10%21 September 2026: 8.83%22 September 2026: 7.68%27 October 2026: 7.68%21 September 202627 October 2026

EPSS moved from 8.8% on 21 September 2026 to 7.7% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-42388source ↗Fortinet FortiOS < 5.6.0 - Cross-Site Scriptinghardware · patryk_bogdanwebapps28 July 2017yes

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.