Vulnerability Details CVE-2026-27625
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 17.1%
CVSS Severity
CVSS v3 Score 8.1
References
Products affected by CVE-2026-27625
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cpe:2.3:a:stirling:stirling_pdf:*