Fortiweb Cross-site Scripting

A improper neutralization of input during web page generation ('cross-site scripting') in Fortinet FortiWeb version 6.4.1 and below, 6.3.15 and below allows attacker to execute unauthorized code or commands via crafted GET parameters in requests to login and error handlers (2021-12-08, CVE-2021-36188)

A improper neutralization of input during web page generation ('cross-site scripting') in Fortinet FortiWeb version 6.4.1 and 6.4.0, version 6.3.15 and below, version 6.2.6 and below allows attacker to execute unauthorized code or commands via crafted HTTP GET requests to the login webpage. (2021-12-08, CVE-2021-43063)

A improper neutralization of input during web page generation ('cross-site scripting') in Fortinet FortiWeb version 6.4.1 and below, 6.3.15 and below allows attacker to execute unauthorized code or commands via crafted HTTP requests to SAML login handler (2021-12-08, CVE-2021-41015)

An improper neutralization of input vulnerability [CWE-79] in FortiWebManager versions 6.2.3 and below, 6.0.2 and below may allow a remote authenticated attacker to inject malicious script/tags via the name/description/comments parameter of various sections of the device. (2021-10-06, CVE-2021-36175)

An improper neutralization of input during web page generation in FortiWeb GUI interface 6.3.0 through 6.3.7 and version before 6.2.4 may allow an unauthenticated, remote attacker to perform a reflected cross site scripting attack (XSS) by injecting malicious payload in different vulnerable API end-points. (2021-02-08, CVE-2021-22122)

An improper neutralization of input vulnerability in FortiWeb allows a remote authenticated attacker to perform a stored cross site scripting attack (XSS) via the Disclaimer Description of a Replacement Message. (2020-03-17, CVE-2020-6646)

An Improper Neutralization of Input vulnerability in the Anomaly Detection Parameter Name in Fortinet FortiWeb 6.0.5, 6.2.0, and 6.1.1 may allow a remote unauthenticated attacker to perform a Cross Site Scripting attack (XSS). (2020-03-12, CVE-2019-16156)

The URL part of the report message is not encoded in Fortinet FortiWeb 6.0.2 and below which may allow an attacker to execute unauthorized code or commands (Cross Site Scripting) via attack reports generated in HTML form. (2019-08-28, CVE-2019-5590)

Cross site scripting is an attack where a web page executes code that is injected by an adversary. It usually appears, when users input is presented. This attack can be used to impersonate a user, take over control of the session, or even steal API keys.

The attack can be executed e.g. when you application injects the request parameter directly into the HTML code of the page returned to the user:

https://server.com/confirmation?message=Transaction+Complete

what results in:

<span>Confirmation: Transaction Complete</span>

In that case the message can be modified to become a valid Javascript code, e.g.:

https://server.com/confirmation?message=<script>dangerous javascript code here</script>

and it will be executed locally by the user's browser with full access to the user's personal application/browser data:

<span>Confirmation: <script>dangerous javascript code here</script></span>