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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Stirling-Tools | Stirling-PDF | < 1.1.0 | — |
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- Stirling-PDF SSRF via Markdown http/cves/2025/CVE-2025-55161.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.