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Critical · 9.8 CVE-2021-47936 EUVD-2021-34797GHSA-6w77-cp2c-mfxq

OpenCATS 0.9.4 Remote Code Execution via Resume Upload

Published May 10, 2026 · Updated May 11, 2026 · Assigned by VulnCheck

Description

OpenCATS 0.9.4 contains a remote code execution vulnerability that allows unauthenticated attackers to execute arbitrary commands by uploading malicious PHP files disguised as resume attachments. Attackers can upload PHP payloads through the careers job application endpoint and execute system commands via POST requests to the uploaded file in the upload directory.

Affected products

VendorProductAffectedFixed
Opencats OpenCATS ≤ 0.9.4 —

References