CVE-2026-33436— Stirling-PDF: Reflected XSS through crafted filename in file upload functionality
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I. Basic Information for CVE-2026-33436
Vulnerability Information
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Vulnerability Title
Stirling-PDF: Reflected XSS through crafted filename in file upload functionality
Source: NVD (National Vulnerability Database)
Vulnerability Description
Stirling-PDF is a locally hosted web application that facilitates various operations on PDF files. In versions prior to 2.0.0, file upload endpoints render user-supplied filenames directly into HTML using unsafe methods like innerHTML without sanitization. An attacker can craft a file with a malicious filename containing JavaScript that executes in the uploading user's browser context, resulting in reflected XSS. The issue affects numerous upload endpoints across the application. The issue has been fixed in version 2.0.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Stirling-PDF 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Stirling-PDF是Stirling Tools开源的一个使用 Docker 的强大、本地托管的基于 Web 的 PDF 操作工具。 Stirling-PDF 2.0.0之前版本存在安全漏洞，该漏洞源于文件上传端点使用innerHTML等方法直接渲染用户提供的文件名，可能导致反射型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Stirling-Tools | Stirling-PDF | < 2.0.0 | - |
II. Public POCs for CVE-2026-33436
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: Stirling-PDF
- CVE-2026-34071
Stirling-PDF has Stored Cross Site Scripting (XSS) via EML-t - CVE-2026-33438
Stirling-PDF vulnerable to DoS via add-watermark - CVE-2026-27625
Stirling-PDF Zip Slip: Arbitrary File Write via Path Travers - CVE-2025-55161
Stirling-PDF SSRF vulnerability on /api/v1/convert/markdown/ - CVE-2025-55150
Stirling-PDF SSRF vulnerability on /api/v1/convert/html/pdf
Same vendor: Stirling-Tools
- CVE-2026-34071
Stirling-PDF has Stored Cross Site Scripting (XSS) via EML-t - CVE-2026-33438
Stirling-PDF vulnerable to DoS via add-watermark - CVE-2026-27625
Stirling-PDF Zip Slip: Arbitrary File Write via Path Travers - CVE-2025-55161
Stirling-PDF SSRF vulnerability on /api/v1/convert/markdown/ - CVE-2025-55150
Stirling-PDF SSRF vulnerability on /api/v1/convert/html/pdf
Same weakness: CWE-20
V. Comments for CVE-2026-33436
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