CVE-2025-55161 HIGH

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

Vendor Stirling-Tools
Product Stirling-PDF
Weakness CWE-918 · SSRF
Published August 11, 2025
Last update August 12, 2025
View on NVD All CVEs

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 11, 2025 CVE published
August 12, 2025 Record updated