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TI-2025-40924 Aliases CVE-2025-66500GHSA-w247-2vxj-mgr3

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

Priority LOW 27CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00207 10th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Foxit Software Inc.webplugins.foxit.combefore 2025‑12‑01—No fix listedCNA
  • webplugins.foxit.com VendorFoxit Software Inc. Affected before 2025‑12‑01 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:foxit:pdf_editor_cloud:*:*:*:*:*:*:*:*before 2025-12-01VulnerableFoxit
  • cpe:2.3:a:foxit:pdf_editor_cloud:*:*:*:*:*:*:*:* Versions before 2025-12-01 Vulnerable ·Foxit

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-66500
  2. 2026-10-03 Alias added: GHSA-w247-2vxj-mgr3

References

Advisory 1

  • TI-2011-04633 Foxit PDF Reader < 4.3.1.0218 JavaScript File Write CVSS 4.0HIGH 8.4
  • TI-2016-06851 Out-of-bounds read in Foxit Reader CVSS 3.0MEDIUM 6.8
  • TI-2018-02932 Use after free in Foxit PDF Reader CVSS 3.1HIGH 7.8
  • TI-2018-02965 Use after free in Foxit PDF Reader CVSS 3.1HIGH 8.8
  • TI-2018-02964 Use after free in Foxit PDF Reader CVSS 3.1HIGH 8.8
  • TI-2018-02962 Use after free in Foxit PDF Reader CVSS 3.1HIGH 8.8
See all 120 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences