CVE-2025-55150: Stirlingpdf Stirling PDF

Critical severity, CVSS 9.8. EPSS: 1.7% chance of exploitation in the next 30 days.

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/html/pdf endpoint to convert HTML 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.

Affected products

• Stirlingpdf Stirling PDF: before 1.1.0 (fixed in 1.1.0)

Published 2025-08-11. Last modified 2026-06-17.