CVE-2018-9186 Cross-site scripting in FortiAuthenticator

What is CVE-2018-9186?

CVE-2018-9186 is a medium-severity cross-site scripting vulnerability in Fortinet, Inc. FortiAuthenticator, published on 31 May 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A cross-site scripting (XSS) vulnerability in Fortinet FortiAuthenticator in versions 4.0.0 to before 5.3.0 "CSRF validation failure" page allows attacker to execute unauthorized script code via inject malicious scripts in HTTP referer header.

Weakness: CWE-79

Which versions are affected by CVE-2018-9186?

It affects 1 product.

Products include Fortinet Fortiauthenticator.

How do I fix CVE-2018-9186?

No fix has been published for CVE-2018-9186 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2018-9186 being exploited?

There is no known exploitation of CVE-2018-9186 in the wild and no public exploit code.

Other vulnerabilities in Fortinet, Inc. FortiAuthenticator

• CVE-2026-44277 Missing authorization in FortiAuthenticator Critical 9.1
• CVE-2013-6990 Privilege escalation in n/a Critical 9.0
• CVE-2021-43067 Information disclosure in Fortinet FortiAuthenticator High 8.3
• CVE-2021-22124 Denial of service in Fortinet FortiSandbox, FortiAuthenticator High 7.5
• CVE-2015-1455 Hardcoded credentials in n/a High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-46pc-6g7g-6hw8.