CVE-2025-55161
BaseFortify
Publication date: 2025-08-11
Last updated on: 2025-08-15
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| stirlingpdf | stirling_pdf | to 1.1.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-918 | The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in Stirling-PDF versions prior to 1.1.0. When converting Markdown to PDF using the /api/v1/convert/markdown/pdf endpoint, the backend calls a third-party tool and applies a security sanitizer. However, this sanitizer can be bypassed, allowing an attacker to perform Server-Side Request Forgery (SSRF), which means the attacker can make the server send unauthorized requests to internal or external systems.
How can this vulnerability impact me? :
The SSRF vulnerability can allow attackers to make unauthorized requests from the server, potentially accessing internal systems, sensitive data, or services that are not directly exposed. This can lead to data exposure, unauthorized actions, or further exploitation within the network.
What immediate steps should I take to mitigate this vulnerability?
Upgrade Stirling-PDF to version 1.1.0 or later, as this version includes a patch that fixes the SSRF vulnerability in the /api/v1/convert/markdown/pdf endpoint.