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CVE-2025-55161

Stirlingpdf Stirling Pdf server-side request forgery (SSRF)

8.6 HIGHPublic exploitEPSS 2.00%
  1. Published11 Aug 2025

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityLow
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

Affected products

Stirlingpdf Stirling Pdf< 1.1.0

Remediation

Fixed in
Stirlingpdf Stirling Pdf≥ 1.1.0

References

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Frequently asked

Is CVE-2025-55161 being actively exploited?

CVE-2025-55161 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 2.00%.

How severe is CVE-2025-55161?

CVE-2025-55161 has a CVSS 3.1 base score of 8.6, rated high. EPSS estimates a 2.00% probability of exploitation.

Which products are affected by CVE-2025-55161?

Affected products include Stirlingpdf Stirling Pdf.

How do I fix CVE-2025-55161?

Upgrade affected software to a fixed version, for example Stirlingpdf Stirling Pdf 1.1.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-55161 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.