CVE-2025-66521

Signals

NVD · CVE-2026-64604 · In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Grab vmcs12 on CR8 interception update iff vCPU is in guest mode When updating CR8NVD · CVE-2026-64603 · In the Linux kernel, the following vulnerability has been resolved: platform/x86: intel-hid: Protect ACPI notify handler against recursion Since commit e2ffcda1NVD · CVE-2026-64602 · In the Linux kernel, the following vulnerability has been resolved: iio: adc: spear: Initialize completion before requesting IRQ In the report from Jaeyoung ChuNVD · CVE-2026-64601 · In the Linux kernel, the following vulnerability has been resolved: ALSA: us144mkii: capture_urb_complete: redundant usb_anchor_urb corrupts anchor list on eachCISA KEV · CVE-2026-20349 · Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection Vulnerability · Added 2026-08-11 · Due 2026-08-14CISA KEV · CVE-2026-68820 · Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability · Added 2026-08-11 · Due 2026-08-25NVD · CVE-2026-64604 · In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Grab vmcs12 on CR8 interception update iff vCPU is in guest mode When updating CR8NVD · CVE-2026-64603 · In the Linux kernel, the following vulnerability has been resolved: platform/x86: intel-hid: Protect ACPI notify handler against recursion Since commit e2ffcda1NVD · CVE-2026-64602 · In the Linux kernel, the following vulnerability has been resolved: iio: adc: spear: Initialize completion before requesting IRQ In the report from Jaeyoung ChuNVD · CVE-2026-64601 · In the Linux kernel, the following vulnerability has been resolved: ALSA: us144mkii: capture_urb_complete: redundant usb_anchor_urb corrupts anchor list on eachCISA KEV · CVE-2026-20349 · Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection Vulnerability · Added 2026-08-11 · Due 2026-08-14CISA KEV · CVE-2026-68820 · Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability · Added 2026-08-11 · Due 2026-08-25

DRAGONS COMMUNITY

CVE-2025-66521

· MEDIUMAnalyzed

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CVSS v3.1

6.3

EPSS

0.11%

Published

Dec 19, 2025

Modified

Dec 23, 2025

Public PoC / Exploit (1)

All weaponized →

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Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.

Description

A stored cross-site scripting (XSS) vulnerability exists in pdfonline.foxit.com within the Trusted Certificates feature. A crafted payload can be injected as the certificate name, which is later rendered into the DOM without proper sanitization. As a result, the injected script executes each time the Trusted Certificates view is loaded.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N

Weaknesses (CWE)

CWE-79

Affected Products (1)

foxit · pdf_editor_cloud (up to 2025-12-01)vulnerable

References (1)

https://www.foxit.com/support/security-bulletins.html

Vendor Advisory

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CVE-2025-66521 — medium severity vulnerability | Dragons Community