CVE-2025-66500

CWE-79 — Cross-site Scripting (XSS)3 documents3 sources
Severity
5.4MEDIUM
EPSS
0.0%
top 86.89%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Foxit PDF Editor CloudFoxit Software Inc. Webplugins.foxit.com
Timeline
PublishedDec 19

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:NExploitability: 2.1 | Impact: 4.2

Affected Packages2 packages

▶CVEListV5foxit_software_inc./webplugins.foxit.combefore 2025‑12‑01
▶NVDfoxit/pdf_editor_cloud< 2025-12-01

🔴Vulnerability Details

2
GHSA
GHSA-w247-2vxj-mgr3: A stored cross-site scripting (XSS) vulnerability exists in webplugins↗2025-12-19
▶
CVEList
Foxit webplugins.foxit.com Stored Cross-Site Scripting via postMessage Vulnerability↗2025-12-19
▶
CVE-2025-66500 (MEDIUM CVSS 5.4) | A stored cross-site scripting (XSS) | cvebase.io