CVE-2025-55161

Name: CVE-2025-55161
Creator: NVD / NIST
Published: 2025-08-11T23:15:28.327+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.86%

Last modified Jun 17, 2026

CVE-2025-55161 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 1.86% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.86%

76.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-918

Affected Software

Vendor	Product	Versions
Stirlingpdf	Stirling Pdf	< 1.1.0

References

https://github.com/Stirling-Tools/Stirling-PDF/commit/7d6b70871bad2a3ff810825f7382c49f55293943Patch
https://github.com/Stirling-Tools/Stirling-PDF/security/advisories/GHSA-ff33-grr6-rmvpExploit, Third Party Advisory

Timeline

Published: Aug 11, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-55161?

How severe is CVE-2025-55161?

CVE-2025-55161 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.86% probability of exploitation in the next 30 days.

How do I fix CVE-2025-55161?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-55161?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST