CVE-2025-66500

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

Published Dec 19, 2025 CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Foxit
Foxit pdf Editor Cloud
CPEs cpe:2.3:a:foxit:pdf_editor_cloud:*:*:*:*:*:*:*:*
Vendors & Products Foxit
Foxit pdf Editor Cloud
Type Values Removed Values Added
First Time appeared Foxitsoftware
Foxitsoftware webplugins
Vendors & Products Foxitsoftware
Foxitsoftware webplugins
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Foxit webplugins.foxit.com Stored Cross-Site Scripting via postMessage Vulnerability
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Foxit
Published
Updated
Dec 19, 2025, 5:14 PM
Reserved
Dec 3, 2025, 1:33 AM
Status
Analyzed
Published
Dec 19, 2025, 8:15 AM
Modified
Jun 17, 2026, 9:56 AM