What’s Vulnerable › Vulnerabilities
CVE-2025-66500: Foxit webplugins.foxit.com Stored Cross-Site Scripting via postMessage Vulnerability
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-12-19 · updated 2026-06-17
- Weakness: CWE-79
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.
Affected products
- Foxit Pdf Editor Cloud: before 2025-12-01 — fixed in 2025-12-01
How to fix
Upgrade to a fixed version: Foxit Pdf Editor Cloud 2025-12-01. Check the vendor advisory for mitigations.
References
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