CVE-2025-66500
Medium
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.
SeverityMedium
CVSS6.3
Exploit probability—
ProductFoxit Pdf Editor Cloud
PublishedDec 19, 2025
First seenDec 19, 2025
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- foxit pdf_editor_cloud2025-12-01 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| foxit pdf_editor_cloud | v < 2025-12-01 | 2025-12-01 |
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