What is the CVSS score of CVE-2025-55161?

CVE-2025-55161 has a CVSS 3.1 base score of 8.6 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L. EPSS exploitation probability: 6.4%.

Which versions of Stirling Pdf are affected by CVE-2025-55161?

Organizations using Stirling-PDF face significant risk from CVE-2025-55161, a server-side request forgery vulnerability rated CVSS 8.6.. A patch is available.

Is there a public PoC exploit available for CVE-2025-55161?

Yes, a public proof-of-concept exploit is available for CVE-2025-55161. Prioritise patching immediately. EPSS: 6.4%.

How to fix or mitigate CVE-2025-55161?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Implement egress filtering and URL validation for server-side requests.

Stirling Pdf CVE-2025-55161

HIGH

Server-Side Request Forgery (SSRF) (CWE-918)

2025-08-11 security-advisories@github.com

SSRF Stirling Pdf Stirlingpdf

8.6

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

8.6 HIGH

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:06 vuln.today

Patch released

Mar 28, 2026 - 19:06 nvd

Patch available

PoC Detected

Aug 15, 2025 - 18:05 vuln.today

Public exploit code

CVE Published

Aug 11, 2025 - 23:15 nvd

HIGH 8.6

DescriptionGitHub Advisory

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.

AnalysisAI

Stirling-PDF is a locally hosted web application that performs various operations on PDF files. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Server-Side Request Forgery (SSRF) (CWE-918), which allows attackers to make the server perform requests to unintended internal or external resources. 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 include: Stirlingpdf Stirling Pdf. Version information: version 1.1.0.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate and allowlist destination URLs, block requests to internal networks, use network segmentation.