CVE-2021-47936

CRITICAL 9.8CVE-2021-47936 · Published 10/05/2026 · updated 06/10/2026

In short

CVE-2021-47936 is a CRITICAL (CVSS 9.8) vulnerability.
Chance of exploitation in the next 30 days (EPSS): 0.66%, higher than 51.4% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
—	No affected product versions are listed for this vulnerability yet.

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.

References

opencats/OpenCATS
exploit-db.com/exploits/50585
opencats.org
vulncheck.com/advisories/opencats-remote-code-execution-via-resume-upload

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