CVE-2025-66500

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

State: Published
Severity: 6.3 Medium
Published: Dec 19, 2025
Updated: Dec 19, 2025
Reserved: Dec 3, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	6.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N	Foxit

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Affected Products

Product	Versions
webplugins.foxit.comFoxit Software Inc.	before 2025‑12‑01Affected

References

https://www.foxit.com/support/security-bulletins.html

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.