EUVD-2026-13638CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
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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.
Analysis
Stirling-PDF, a locally hosted web application for PDF operations, contains a path traversal vulnerability in the /api/v1/convert/markdown/pdf endpoint that allows authenticated users to write arbitrary files outside the intended directory. Versions prior to 2.5.2 are affected, enabling attackers to overwrite writable files with the privileges of the stirlingpdfuser process account, compromising data integrity and potentially availability. …
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Remediation
Within 24 hours: Inventory all Stirling-PDF instances and confirm versions below 2.5.2; restrict network access to the application to trusted networks only. Within 7 days: Contact the vendor for patch availability timeline and evaluate alternative PDF solutions if upgrade is not feasible; implement enhanced monitoring on affected systems. …
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