SSRF in Stirlingpdf Stirling Pdf
CVE-2025-55161
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L.
EPSS exploit prediction
EPSS: 0.020 (79.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: +0.000
Affected products
- Stirlingpdf Stirling Pdf
- Stirling-Tools Stirling-Pdf — versions < 1.1.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-ff33-grr6-rmvp (Exploit, Third Party Advisory)
- github.com/Stirling-Tools/Stirling-PDF/commit/7d6b70871bad2a3ff810825f7382c49f5… (Patch)
Frequently asked questions
- What is CVE-2025-55161?
- CVE-2025-55161 is a high-severity vulnerability in Stirlingpdf Stirling Pdf, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.6/10. Published 2025-08-11.
- How severe is CVE-2025-55161?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2025-55161 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.