CVE-2025-66521

Medium · 5.4

CVSS

5.4

EPSS

0.1%

Published

Dec 19, 2025

CISA due date

—

The record

A stored cross-site scripting (XSS) vulnerability exists in pdfonline.foxit.com within the Trusted Certificates feature. A crafted payload can be injected as the certificate name, which is later rendered into the DOM without proper sanitization. As a result, the injected script executes each time the Trusted Certificates view is loaded.

Affected packages

Ecosystem	Package	Introduced	Fixed