CVE-2021-47936
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductOpenCATS
PublishedMay 10, 2026
First seenMay 10, 2026
Weakness typeCWE-306Missing authentication for critical function
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Opencats OpenCATS | v ≤ 0.9.4 | — |
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