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CVE-2025-55161— Stirling-PDF SSRF vulnerability on /api/v1/convert/markdown/pdf

CVSS 8.6 · High EPSS 5.62% · P90
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I. Basic Information for CVE-2025-55161

Vulnerability Information
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Vulnerability Title
Stirling-PDF SSRF vulnerability on /api/v1/convert/markdown/pdf
Source: NVD (National Vulnerability Database)
Vulnerability Description
Stirling-PDF is a locally hosted web application that performs various operations on PDF files. Prior to version 1.1.0, when using the /api/v1/convert/markdown/pdf endpoint to convert Markdown to PDF, the backend calls a third-party tool to process it and includes a sanitizer for security sanitization which can be bypassed and result in SSRF. This issue has been patched in version 1.1.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
服务端请求伪造(SSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Stirling-PDF 代码问题漏洞
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 1.1.0之前版本存在代码问题漏洞，该漏洞源于Markdown转PDF功能中的清理器可被绕过，可能导致服务端请求伪造。
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

VendorProductAffected VersionsCPESubscribe
Stirling-ToolsStirling-PDF < 1.1.0 -

II. Public POCs for CVE-2025-55161

#POC DescriptionSource LinkShenlong Link
1Stirling-PDF is a locally hosted web application that performs various operations on PDF files. Prior to version 1.1.0, when using the /api/v1/convert/markdown/pdf endpoint to convert Markdown to PDF, the backend calls a third-party tool to process it and includes a sanitizer for security sanitization which can be bypassed and result in SSRF. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-55161.yamlPOC Details
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III. Intelligence Information for CVE-2025-55161

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Same Patch Batch · Stirling-Tools · 2025-08-11 · 3 CVEs total

CVE-2025-551518.6 HIGHStirling-PDF SSRF vulnerability on /api/v1/convert/file/pdf
CVE-2025-551508.6 HIGHStirling-PDF SSRF vulnerability on /api/v1/convert/html/pdf

IV. Related Vulnerabilities

Same product: Stirling-PDF
Same vendor: Stirling-Tools
Same weakness: CWE-918

V. Comments for CVE-2025-55161

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