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CVE-2025-55161

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Date: August 11, 2025

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.

Severity Score

Related Resources (4)

https://nvd.nist.gov/vuln/detail/CVE-2025-55161
https://github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-ff33-grr6-rmvp
https://github.com/Stirling-Tools/Stirling-PDF/commit/7d6b70871bad2a3ff810825f7382c49f55293943
https://www.mend.io/vulnerability-database/CVE-2025-55161

Severity Score

Weakness Type (CWE)

Server-Side Request Forgery (SSRF)

CWE-918

Top Fix

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Upgrade Version

Upgrade to version https://github.com/Stirling-Tools/Stirling-PDF.git - v1.1.0

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): LOW
Availability (A): LOW

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