CVE-2025-66500 Details
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.
A stored cross-site scripting vulnerability has been identified in Foxit PDF Reader and Foxit PDF Editor. This vulnerability exists in versions through 2025.2.1.33197 for Foxit PDF Reader and versions through 2025.2.1/14.0.1/13.2.1 for Foxit PDF Editor. The issue arises in the webplugins.foxit.com service, where a postMessage handler fails to properly validate the message origin. This flaw allows attackers to execute arbitrary JavaScript by sending crafted postMessages that are not adequately checked before being processed.
Users can update to Foxit PDF Reader 2025.3 or Foxit PDF Editor 2025.3/14.0.2/13.2.2. Instructions for updating are available on the Foxit website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Dec 19, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.foxit.com/support/security-bulletins.html | Foxit | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | Foxit |
Affected Products
| Product | Versions |
|---|---|
| foxit pdf editor cloud | < 2025-12-01 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | Foxit |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Dec 23, 2025 | Initial Analysis | [email protected] |
| Dec 19, 2025 | New CVE Received | Foxit |