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CVE-2025-55161

Stirling-PDF SSRF vulnerability on /api/v1/convert/markdown/pdf

Basic Information

CVE State
PUBLISHED
Reserved Date
August 07, 2025
Published Date
August 11, 2025
Last Updated
August 12, 2025
Vendor
Stirling-Tools
Product
Stirling-PDF
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.
Tags
nuclei_scanner

CVSS Scores

CVSS v3.1

8.6 - HIGH

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

SSVC Information

Exploitation
poc
Technical Impact
partial

Exploit Status

Exploited in the Wild
Yes (2025-10-08 00:00:00 UTC) Source

References

https://github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-ff33-grr6-rmvp https://github.com/Stirling-Tools/Stirling-PDF/commit/7d6b70871bad2a3ff810825f7382c49f55293943

Known Exploited Vulnerability Information

Source Added Date
The Shadowserver (via CIRCL) 2025-10-08 00:00:00 UTC

Scanner Integrations

Scanner URL Date Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-55161.yaml 2026-06-01 15:34:42 UTC

Timeline

  • CVE ID Reserved

  • CVE Published to Public

  • Added to KEVIntel

  • Detected by Nuclei