Web Security and SSE
CVE-2023-6452: Cross-site scripting in Web Security
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Forcepoint Web Security (Transaction Viewer) allows Stored XSS.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Web Security 0 | 8.5.6 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Forcepoint Web Security (Transaction Viewer) allows Stored XSS.
The Forcepoint Web Security portal allows administrators to generate detailed reports on user requests made through the Web proxy. It has been determined that the "user agent" field in the Transaction Viewer is vulnerable to a persistent Cross-Site Scripting (XSS) vulnerability, which can be exploited by any user who can route traffic through the Forcepoint Web proxy.
This vulnerability enables unauthorized attackers to execute JavaScript within the browser context of a Forcepoint administrator, thereby allowing them to perform actions on the administrator's behalf. Such a breach could lead to unauthorized access or modifications, posing a significant security risk.
This issue affects Web Security: before 8.5.6.
Am I affected?
The User Agent field must be displayed in the Transaction Viewer, it is not by default. Users should avoid adding the User Agent field to the Transaction Viewer until the workaround is implemented or Web Security is upgraded to version 8.5.6 or later.
Workarounds
Users should avoid adding the User Agent field to the Transaction Viewer until the workaround is implemented or Web Security is upgraded to version 8.5.6 or later.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 11 Oct 2026.