Local File Processing Vulnerability in Stirling-PDF Web Application
CVE-2025-55161

9.8CRITICAL

Key Information:

Vendor

Stirling-tools

Status
Stirling-PDF
Vendor
CVE Published:
11 August 2025

What is CVE-2025-55161?

Stirling-PDF, a web application designed for processing PDF files, has a security flaw in its PDF conversion endpoint. In versions before 1.1.0, the application uses a third-party tool for Markdown to PDF conversion. However, the security measures in place for sanitization can be bypassed, leading to potential server-side request forgery (SSRF) vulnerabilities. This flaw could allow malicious actors to exploit the system, resulting in unauthorized access to internal network resources. The issue has been addressed in version 1.1.0 with a patch that reinforces the sanitization process.

Affected Version(s)

Stirling-PDF < 1.1.0

References

https://github.com/Stirling-Tools/Stirling-PDF/security/a...
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https://github.com/Stirling-Tools/Stirling-PDF/commit/7d6...
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EPSS Score

5% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.