CVE-2025-66500CWE-79

Foxit webplugins.foxit.com Stored Cross-Site Scripting via postMessage Vulnerability

Medium · published December 19, 2025

CVSS v3.1
6.3
EPSS
0%
Percentile
10.2
In the wild
Unconfirmed
What it is

A stored cross-site scripting (XSS) vulnerability exists in webplugins.foxit.com. A postMessage handler fails to validate the message origin and directly assigns externalPath to a script source, allowing an attacker to execute arbitrary JavaScript when a crafted postMessage is received.

The record
Technical detail
CVSS v3.1
6.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00207 · 10.2th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2025-12-19T07:16Z
EPSS history
Timeline
  • 19 DEC 07:16Z
    Foxit webplugins.foxit.com Stored Cross-Site Scripting via postMessage Vulnerability
    cvelistv5