CVE-2025-66500 MEDIUM

CVE-2025-66500: Foxit webplugins.foxit.com Stored Cross-Site Scripting via postMessage Vulnerability

Vendor Foxit Software Inc.
Product webplugins.foxit.com
Weakness CWE-79 · XSS
Published December 19, 2025
Last update December 19, 2025
View on NVD All CVEs

CVSS base score

6.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality High
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 19, 2025 CVE published
December 19, 2025 Record updated