CVE-2025-66501
Medium
Description
A stored cross-site scripting (XSS) vulnerability exists in pdfonline.foxit.com within the Predefined Text feature of the Foxit eSign section. A crafted payload can be stored via the Identity “First Name” field, which is later rendered into the DOM without proper sanitization. As a result, the injected script may execute when predefined text is used or when viewing document properties.
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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