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CVE-2026-27625

Stirling Pdf path traversal

8.1 HIGHPublic exploitEPSS 0.53%
  1. Published20 Mar 2026

Description

Stirling-PDF is a locally hosted web application that performs various operations on PDF files. In versions prior to 2.5.2, the /api/v1/convert/markdown/pdf endpoint extracts user-supplied ZIP entries without path checks. Any authenticated user can write files outside the intended temporary working directory, leading to arbitrary file write with the privileges of the Stirling-PDF process user (stirlingpdfuser). This can overwrite writable files and compromise data integrity, with further impact depending on writable paths. The issue was fixed in version 2.5.2.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Affected products

Stirling Pdf< 2.5.2

Remediation

Fixed in
Stirling Pdf≥ 2.5.2

References

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Frequently asked

Is CVE-2026-27625 being actively exploited?

CVE-2026-27625 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.53%.

How severe is CVE-2026-27625?

CVE-2026-27625 has a CVSS 3.1 base score of 8.1, rated high. EPSS estimates a 0.53% probability of exploitation.

Which products are affected by CVE-2026-27625?

Affected products include Stirling Pdf.

How do I fix CVE-2026-27625?

Upgrade affected software to a fixed version, for example Stirling Pdf 2.5.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-27625 against the real software inventory on every managed device, every day. 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.