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Vulnerability record · CVE-2016-3978 · published 8 April 2016

CVE-2016-3978: Fortinet fortios cross-site scripting vulnerability

Fortinet · Fortios

The Web User Interface (WebUI) in FortiOS 5.0.x before 5.0.13, 5.2.x before 5.2.3, and 5.4.x before 5.4.0 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks or cross-site scripting (XSS) attacks via the "redirect" parameter to "login."

6.1 CVSS 3.0 Medium EPSS 5.9% · top 7.0% CWE-79 · Cross-site scripting
6.1CVSS 3.0 base score, v2 4.3
5.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

The Web User Interface (WebUI) in FortiOS 5.0.x before 5.0.13, 5.2.x before 5.2.3, and 5.4.x before 5.4.0 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks or cross-site scripting (XSS) attacks via the "redirect" parameter to "login."

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://seclists.org/fulldisclosure/2016/Mar/68
http://www.fortiguard.com/advisory/fortios-open-redirect-vulnerability Vendor Advisory
http://www.securitytracker.com/id/1035332
http://seclists.org/fulldisclosure/2016/Mar/68
http://www.fortiguard.com/advisory/fortios-open-redirect-vulnerability Vendor Advisory
http://www.securitytracker.com/id/1035332

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2016-3978), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.