# Exploit Title: Forcepoint WebSecurity 8.5 - Reflective Cross-Site Scripting# Exploit Author: Prasenjit Kanti Paul# Vendor Homepage: https://www.forcepoint.com/# Software Link: https://www.forcepoint.com/product/cloud-security/web-security# Version: Forcepoint Web Security 8.5# Tested on: Windows 7,10 and Linux Mint# CVE : CVE-2019-6146# ForcePoint KBA: https://support.forcepoint.com/KBArticle?id=000017702# Video PoC: https://youtu.be/NfXGaNVK6eE# Description: User must visit any site which is restricted as per# forcepoint policy. So that forcepoint web security will show a generic# page. While parsing "Domain Name" within generic page forcepoint is not# validating Host header, which caused XSS.
Lets assume,while accessing anysite.com, forcepoint web security prevents
us to go to that website with its custom exception/blocking page. Now
follow the steps below:
*Steps*:
1. Intercept the traffic while accessing https://anysite.com
2. Modify the Host header from anysite.com to ">
<script>alert("evilsite")</script>
*Timeline:*- Oct. 21, 2019 - Issue Reported to PSIRT team of ForcePoint
- Oct. 23, 2019 - ForcePoint team confirms the issue
- Oct. 24, 2019 - CVE-2019-6146 has been assigned
- Jan. 23, 2020 - ForcePoint KBA has been published with proper fixes
*Regards,**Prasenjit Kanti Paul*
