CVE-2019-15706 Cross-site scripting in FortiOS

What is CVE-2019-15706?

CVE-2019-15706 is a medium-severity cross-site scripting vulnerability in Fortinet Fortios, published on 17 Mar 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

An improper neutralization of input during web page generation in the SSL VPN portal of FortiProxy version 2.0.0, version 1.2.9 and below and FortiOS version 6.2.1 and below, version 6.0.8 and below, version 5.6.12 may allow a remote authenticated attacker to perform a stored cross site scripting attack (XSS).

Weakness: CWE-79

Which versions are affected by CVE-2019-15706?

It affects 2 products.

Products include Fortinet Fortios, Fortinet Fortiproxy.

How do I fix CVE-2019-15706?

No fix has been published for CVE-2019-15706 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-2019-15706 being exploited?

There is no known exploitation of CVE-2019-15706 in the wild and no public exploit code.

Other vulnerabilities in Fortinet Fortios

• CVE-2024-23113 Fortinet Multiple Products Format String Exploited Critical 9.8
• CVE-2022-40684 Fortinet Multiple Products Authentication Bypass Exploited Critical 9.8
• CVE-2024-55591 Fortinet FortiOS and FortiProxy Authentication Bypass Exploited Critical 9.6
• CVE-2024-21762 Fortinet FortiOS Out-of-Bound Write Exploited Critical 9.6
• CVE-2022-42475 Fortinet FortiOS Heap-Based Buffer Overflow Exploited Critical 9.3

All Fortinet Fortios vulnerabilities

Sources

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

Also known as GHSA-c369-gmg5-w8pw.